Answer:
First, remember that:
Acceleration = dV/dt
where V is velocity and t is time.
When you launch a projectile (θ between 0° and 90° means that you are not launching it into the ground) you are applying an initial velocity v0, that can be separated in components, where the vertical component will be:
v0*sin(v)
That initial vertical velocity is a constant, so it does not depend on time.
Then when we differentiate with respect to the time, that constant will vanish, and we will get:
rate of change of the vertical velocity = vertical acceleration.
And as you know, when we ignore the air resistance the only force acting on the vertical axis is the gravitational force, such that the vertical acceleration will be:
a(t) = -9.8m/s^2
Where the negative sign is because this force points down.
Then the rate of change of the vertical velocity will be exactly that, -9.8m/s^2.
And the vertical velocity equation, to see exactly how the vertical velocity depends on time, will be:
V(t) = (-9.8m/s^2)*t + v0*sin(θ)
Your science class is going to play a game of tug-of-war and you need to divide up the teams. There are 11 people participating. If you want equal teams, how would you decide who is on which side and why? Use what you have learned about Newton's Laws of motions to explain. I’ll give brainly
Answer: You would divide the kids up by how much they weighed in mass until you would get and equal weight for both teams so the tug of war match would be equal.
Explanation:
Since the goal is to have equal teams, the kids would be divided based on their weights until both teams have equal weight.
There are three Newton's law of motion. The first law is that an object will not alter its motion unless there's a force that acts on it.
In the second law, an object's force equals the mass multiplied by the acceleration. The third law explains that when there is an interaction between two objects, forces are applied.
Since there are 11 people participating and the person wants equal teams, the kids would be divided based on their weights. This is to ensure that the total weights for both teams are the same.
Read related link on:
https://brainly.com/question/13532462
"A farmer needs to get hay to cows in a frozen field. Using an airplane flying 40 m/s, at a height of 280 m, how far from the cow would she have to release the hay in order to hit the cow?" What is the horizontal velocity you would use to solve this problem?
Answer:
x = 302 m
Explanation:
Given that,
Speed of an airplane, v = 40 m/s
Height, h = 280 m
40 m/s is the horizontal velocity we should use to solve the given problem.
Let t is the time when the hay will reach the ground. It can be calculated using second equation of motion as follows :
[tex]h=ut+\dfrac{1}{2}at^2[/tex]
Here, u = 0 and a = g
[tex]h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 280}{9.8}} \\\\=7.55\ s[/tex]
Let the horizontal distance is x. It can be calculated as :
x = vt
x = 40 m/s × (7.55 s)
x = 302 m
Hence, at a distance of 302 m she have to release the hay in order to hit the cow.
Consider this situation: A team of landscapers pull an
unplanted tree across the lawn. Of the forces listed, identify
which act upon the tree.
Normal
Gravity
Applied
Friction
Tension
Air Resistance
Answer:
Explanation:
all
which relationship benefits two organisms
Answer:
mutualism
Explanation:
Mutualism, a relationship in which both species benefit, is common in nature. In microbiology, there are many examples of mutualistic bacteria in the gut that aid digestion in both humans and animals.
a car at point A travels at a constant velocity of 80km/h towards point B. the distance between the points is 160km. how long does it take to get from point A to point B
Answer:
t = 7200.07seconds or 2 hours
Explanation:
given:
velocity (v) : 80km/h = 80 × 1000 m/ 60 × 60 s
= 80,000m/3600s => 22.222m/s
distance(d) = 160km => 160 × 1000 = 160,000m
time(t) = ?
since v=d/t
therefore, t= d/v
t= 160,000/22.222
t= 7,200.07seconds
or t= 7,200/3600 = 2 hours.
how does the friction get affected by the nature of surface?
Answer:
The heat causes the molecules on rubbing surfaces to move faster and have more energy.
Four ropes each attached to the end of a freight elevator are used to pull the small elevator upward through a wide elevator shaft of the forces list below which act upon the elevator
These options are missing in the question
(a) Normal force
(b) Gravity force
(c) Applied force
(d) Friction force
(e) Tension force
(f) Air tension
Answer:
(b) Gravity force
(e) Tension force
(f) Air resistance
Explanation:
Normal force: NO, Normal force acts when body surfaces are in contact to push each other since lift is hanging and no surface contact is there so no Normal force.
Gravity force: YES. This force is acted on each and every body that lies in the vicinity of earth's gravitational field, as the life is hanging so it will experience Gravity force.
Applied force: NO.as there is no force given to the Elevator.
Friction force: NO. Friction fore occurs when bodies rub against each other or has a surface of contact, lift do not touch any surface hence no Frictional force.
Tension force: YES. The Elevator is hanging with the support of Four ropes and tension is acting in these ropes.
Air resistance: YES. The Elevator will experience Air resistance as it will move through the wide shaft.
15. What is uniform velocity? Calculate the acceleration of a body moving with uniform
velocity
Answer: Uniform Velocity-A body is said to have uniform velocity if it covers equal distance in equal intervals of time in a particular direction, however, the time intervals may be small. ... Examples of the body moving with variable velocity: 1.
Explanation:
Which type of thermal energy causes ocean currents?
Answer:
convection thermal energy causes ocean currents?
Kieran pushes a box with a force of 35 N. It accelerates at 5 m/s2. What is the first step that is needed to calculate the mass of the box?
Identify the formula to calculate velocity.
Identify the formula to calculate force.
Identify the formula to calculate acceleration.
Identify the formula to calculate weight.
Answer:
f=ma
mass of box =7kg
Explanation:
Answer:
Identify the formula to calculate velocity.
Explanation:
Sorry I have no explanation.
:(
But hope this helps!!!
Guys PLZ I NEED HELP
The Colorado Plateau includes large parts of Utah, Colorado, Arizona, and New Mexico. The plateau is known for unique rock formations, many in brilliant shades of red, as shown here. This red rock is formed by the reaction of iron and oxygen to form iron oxide.
Which type of weathering has occurred to cause the rock within the Colorado Plateau to become red?
A.
Oxidation
B.
Carbonation
C.
Abrasion
D.
Hydrolysis
Answer: Oxidation
Explanation:
Because it is :)
Answer:
A. Oxidation
Explanation:
IVLA - I just finished the test. Trust me.
A 0.25 kg Soccer ball is rolling at 6,0 m/s toward a player, The player kicks the ball in the opposite direction and gives it a Velocity of 24.0 m/s. A) What is the change in Momentum of the Ball? B) If the actual kick lasts ,02 selonds, what Force acts on the ball?
Answer:
A) ΔP = 4.5 [kg*m/s]
B) F = 375 [N]
Explanation:
The linear momentum is defined as the product of the mass of a body by Velocity, therefore we must calculate the momentum for each case.
[tex]P = m*v[/tex]
where:
P = linear momentum [kg*m/s]
m = mass [kg]
v = velocity [m/s]
A)
When the soccer ball is rolling towards the player
[tex]P =0.25*6\\P = 1.5[kg*\frac{m}{s}][/tex]
After kicking the ball
[tex]P = 0.25*24\\P = 6 [kg*\frac{m}{s} ][/tex]
Therefore the change momentum is equal to
ΔP = 6 - 1.5 = 4.5 [kg*m/s]
B) Momentum is defined as the force applied for a certain time, this momentum produces a linear momentum.
We must be especially careful in the directions of the movement, since depending on the direction a positive or negative sign must be included according to the established convention. In this particular case we are going to take the kick and the direction of this as positive, that is to say, the ball moves in the negative direction and after hitting the ball it moves in a positive direction.
[tex]-(m*v_{1}) + F*t = (m*v_{2})\\-(0.25*6) + (F*0.02) = (.25*24)\\F*0.02= (7.5)\\F = 375 [N][/tex]
This man proposed that all matter was composed of atoms
Answer:
Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. while all atoms of an element were indentical , different element had atoms of differing size and mass.
Explanation:
hope it's helpful
a resistor, of resistance 47 , is damaged when it dissipates a power greater than 0.5W. determine the maximum voltage that can be applied without damaging the resistor
Answer:
The maximum voltage that can be applied without damaging the resistor is 4.85 V
Explanation:
Electric Power in a Resistor
Given a resistor or resistance R connected to a circuit of voltage V carrying a current I. The relation between these three magnitudes is given by Ohm's Law:
V = R.I
The dissipated power P of a resistor can be calculated by the following equation, known as Joule's first law:
[tex]P = I^2.R[/tex]
Solving the first equation for I:
[tex]\displaystyle I=\frac{V}{R}[/tex]
Substituting in the second equation:
[tex]\displaystyle P=\frac{V^2}{R^2}.R[/tex]
Simplifying:
[tex]\displaystyle P=\frac{V^2}{R}[/tex]
Solving for V:
[tex]V=\sqrt{P.R}[/tex]
The resistor has a resistance of R=47Ω and can hold a maximum power of P=0.5 W, thus the maximum voltage is:
[tex]V=\sqrt{0.5\cdot 47}[/tex]
[tex]V=\sqrt{23.5}[/tex]
V = 4.85 V
The maximum voltage that can be applied without damaging the resistor is 4.85 V
You drive a bumper car into another bumper car whose driver has a much larger body mass than you do. Who experiences more of a jolt, you or the other driver?
Answer:
both drivers experience the same force. just with different "results"
Explanation:
Answer:
You do
Explanation:
Momentum is mass*velocity. So Newton's 3rd law equal and opposite reaction. Because you weigh less you will have more force act on you than the driver who weighs more.
Why does ice change into water on heating ?
Answer:
Explanation:
Changing states of matter and energy
A block of ice is solid water. When heat (a form of energy) is added, the ice melts into liquid water. If heat is removed from water vapour, the gas cools down and it condenses back into liquid water. Continue to cool the water (by removing heat), and it becomes solid ice.
plz mark as brainliest
can y’all answer this I asked so many times I’m loosing points
At what temperature will the air in the oven have a thermal energy of 5.0 x 10 J?
Answer:
I think it is 50 j, I am not sure and also please let me know if I am wrong.
Answer: hey
Explanation:
What is the mechanical advantage of a wedge, with input force of 2.4 N and output force of 5.3 N
Answer:
approx. 2.21
Explanation:
5.3/2.4 = 2.208
1. Two objects are separated by a distance of 1.60 m. One object has a mass of 75 kg and the other has a mass of 50 kg. What gravitational force exists between the two objects?
Answer:
airestence?
Explanation:
How much power is generated by a motor that can do 3,000j of work in 75s
Answer:
40watts
Explanation:
Given parameters:
Work done = 3000J
Time = 75s
Unknown:
Power generated = ?
Solution:
Power is the rate at which work is done;
Power = [tex]\frac{work done}{time}[/tex]
Now, insert the parameters and solve;
Power = [tex]\frac{3000}{75}[/tex] = 40watts
A 750 kg car zooms away from a red light with an acceleration of 7.8 m/s2. What is the
average net force in Newtons that the car experiences?
Answer:
5850N
Explanation:
Given parameters:
Mass of the car = 750kg
Acceleration = 7.8m/s²
Unknown:
Net force = ?
Solution:
According to Newton's second law of motion;
Force = mass x acceleration
To find the net force input the given parameters:
Net force on the car = 750 x 7.8 = 5850N
A car travels a distance of 3330 meters in 165 seconds what is the velocity
Answer:
Velocity = 20.18 m/s
Explanation:
Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.
Mathematically, velocity is given by the equation;
[tex]Velocity = \frac{distance}{time}[/tex]
[tex]V = \frac{d}{t}[/tex]
Given the following data;
Distance, d = 3330m
Time, t = 165 secs
*To find the velocity*
Substituting into the equation, we have;
[tex]V = \frac{3330}{165}[/tex]
Velocity = 20.18 m/s
Together with a friend, you are carrying a ladder that weighs 130 N. You have cleverly convinced your friend to hold the ladder 0.1 m from the center of gravity, while you yourself are 1.5 m from the center of gravity. How much of the weight of the ladder are you yourself supporting?
Answer:
W₁ = 8.12 N
Explanation:
Consider the weight supported by the person and friend to be:
W₁ = Weight supported by person
W₂ = Weight supported by Friend
Now, their sum must be equal to total weight of ladder. Hence,
W₁ + W₂ = 130 N
W₂ = 130 N - W₁ ---------------- equation (1)
Now, to carry the ladder, the moment due to both person's forces must be equal:
Moment due to person 1 = Moment due to friend
W₁ d₁ = W₂ d₂
where,
d₁ = distance between person and center of gravity = 1.5 m
d₂ = distance between friend and center of gravity = 0.1 m
W₁(1.5 m) = W₂(0.1 m)
W₁ = W₂ (0.1 m/1.5 m)
W₁ = W₂(0.06667)
using equation (1):
W₁ = (130 N - W₁)(0.06667)
W₁ + 0.06667W₁ = 8.6667 N
W₁ = 8.12 N
Please can I have help. This was ment to be due 1 week ago
Answer:
water can be used as displacement to calculate the volume of a solid object.
Answer: If the object has an irregular shape , the volume can be measured using a displacement can . The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the spout. As the irregular object is lowered into the displacement can, the water level rises.
Explanation: google
here you go, just answer the question, 100 points
Answer:
THANK YOUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
Explanation:
I REALLY NEED THIS
Answer:
Oh my gosh yayyy one of the asnwers got deleted!!!! Yay thx for the points
Explanation:
What is one way that potential energy might be involved in rescue team missions?
Answer:
You may be saving someone from a rock slide, where the rocks will fall at any time, before they fall they have potential energy.
Explanation:
You are a passenger in a truck that gets stuck in mud. You and the driver use a tree branch as a lever to lift up the truck. You apply an effort force of 600 N to the branch. The back of the truck weighs 2400 N. What is the mechanical advantage of the branch-lever?
Answer:
i think it is 1,800
Explanation:
plz answer this now anyone plz
Answer:
dx = - 0.0789[m]
Explanation:
In order to solve this problem, we must remember that the vertical component of a vector can be determined using the opposite catheter of the right triangle, by means of the sine function.
[tex]d_{x}=0.250*sin(18.4)\\d_{x} = 0.0789 [m][/tex]
Since the component is directed down, the sign is negative.
dx = - 0.0789[m]
If a permanent magnet picks up a steel paper clip, the paper clip also
becomes a magnet. How does an electromagnet differ from the magnetized
paper clip?
A. An electric current can run through a permanent magnet to
magnetize the steel paper clip, but an electric current cannot run
through the paper clip.
B. A magnet does not form when an electric current interacts with a
magnetic field, but a magnet will form when an electromagnet
interacts with a permanent magnet.
C. An interaction between electricity and magnetism produces an
electromagnet, while a permanent magnet induces the paper clip's
magnetic field.
D. An interaction between electricity and magnetism induces the
paper clip's magnetic field, while an electromagnet is produced by
a permanent magnet.
An interaction between electricity and magnetism produces an
electromagnet, while a permanent magnet induces the paper clip's
magnetic field. Hence, option (C) is correct.
What re permanent magnet and electromagnet?An object that can generate a magnetic field, attract unlike poles, and repel like poles is referred to as a magnet.
Magnets that are frequently utilised are permanent magnets. Because they maintain their magnetic quality after being magnetised, they are referred to as permanent magnets.
A coil of wire is used to create electromagnets (wire curled in series). This generates a magnetic field more effectively than a wire running straight. By tightly winding a wire around a strong magnetic core formed of an iron-based substance, this effect can be amplified. In the image above, a coil is seen wrapped around an iron nail. The iron nail is not magnetic on its own.
Learn more about magnet here:
https://brainly.com/question/2841288
#SPJ5
i need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
With??
Explanation:
