Mathematics High School

a man of mass 50 kg climbs up stairs each of height 0.2 m in 20 seconds .calculate the power of the man​

Answers

Answer 1

Answer:

Given that ,

A man whose mass is 50kg climbs up 30 steps of a stair in 30s

each step is 20 cm high

Height at 30 steps , h=30×0.2=6 m

Change in potential energy , =mgh=50×10×6=3000 J

So, Work done by the man , W=3000 J

Power used , P=

t

W

​

=

30

3000

​

=100 W

Step-by-step explanation:

Related Questions

A helicopter is hovering above a road at an altitude of 24 m. At a certain time, the distance
between the helicopter and a car on the road is 45 m. calculate the angle of depression from
the helicopter from the car. [

Answers

Answer: 32.23°

Suppose the setpoint of a helicopter is A and that of a car is C and that of the road is B

The distance from the helicopter to the car and the road forms a right triangle

=> ΔABC is a right triangle at B

=> the angle of depression from  the helicopter from the car is ∠ACB

we have: ΔABC is a right triangle => sin ∠ACB = 24/45

=> m∠ACB = 32.23°

Step-by-step explanation:

3 bags of dog treats for $7.38. What is the cost per bag of dog treats

Answers

Answer:

each bag cost $2.46

Step-by-step explanation:

you divide 7.38 by 3

Answer:

$3.14

Step-by-step explanation:

How would you write TEN MORE THAN A NUMBER as an algebraic expression???
Plz help I need it for today!!!

Answers

Answer:

x+10

Step-by-step explanation:

Answer:

x+ 10

Step-by-step explanation:

we can take the number as x

and therefore

x+10

How do you write 350% as a fraction or mixed number?

Answers

Answer:

3 50/100 or 3 1/2

Step-by-step explanation:

Each 100% is one, so that would equal 3. There would be 50% left, and that would be 50/100 or 1/2.

What is the measure of angle B in degrees?

Answers

Answer:

112 Degrees

Step-by-step explanation:

I forgot the name of the triangle but all angles are the same :p

119°- because 180-112=68 so that is angle C. Then 68+51=119. So 180-119=61. Then do 180-61 and you get angle B which would be 119°

Oliver has a starting balance of $294.02. He writes a
check for $92.18 for new clothes, takes $20 out at the
ATM maching, and deposits a check from his Aunt
Sally in the amount of $50. Oliver needs to write a
check for $250 for his share of the rent. He does not
have enough money in his account! How much
money does Oliver need to have enough to write the
$250 check?

Answers

Answer:

$18.16

Step-by-step explanation:

A child got 16.67/20 on a test. what is their grade in percent form?​

Answers

Answer:

83.4% or 83%

Step-by-step explanation:

when trying to find a percent, divide the numerator (# of correct answers) by the denominator (# of total questions possible to get correct)

Which would be 16.67 divided by 20 which equals .8335. Move the decimal point over two placements which would be 83.35. I rounded it up to 83.4. If trying to find a whole number not a decimal it would be 84%. Depending on the grading scale, it would be a B.

What number is composite 19,23,33,37,

Answers

Answer:

33

Step-by-step explanation:

33 can be divided evenly by numbers other than one or itself

17 Find the volume of the figure below. (1 Point) V = luh​

Answers

Answer:

sorry I wish I could help but I'm stupid

If 10 minutes talk-time costs $2, how much will 7 minutes cost?

A) $1.40
B) $1.04
C) $1.34

Answers

the answer is A) $1.40

Answer:

A

Step-by-step explanation:

10=2

7=Xthen

10x=14,we divided both side by 10and we get

1.4$

A doctor has an annual income of $152,125. The income tax the doctor has to pay is 6%. What is the amount of income tax in dollars and cents that the doctor has to pay?

Answers

Answer:

9127.50

Step-by-step explanation:

152,125 x 0.06 = 9127.50

Answer:

$9,127.50

Step-by-step explanation:

152,125×.06=9,127.50

Can someone order these from least to greatest? Pls ill give brainliest

Answers

-20

-2.01

-1.001

1.001

1.01

2.10

100

What would the value of x be

Answers

Answer:

Try 34

Step-by-step explanation:

Find the value of x.
a. 96
b. 84
c. 276
d. 264

Answers

Answer:

The answer is a. 96

Step-by-step explanation:

53+31+x=180

84+x=180

(84-84)+x=180-84

x = 96

can someone please help me with this I will also give brainliest.​

Answers

Answer:

C) 3*10^6

Step-by-step explanation:

Divide the two numbers:

(6*10^-2)/(2*10^-8)=6/2*(10^-2/10^-8)=3*10^(-2-(-8))=3*10^(-2+8)=3*10^6

So C is correct

Answer:

A) 3*10^-10

Step-by-step explanation:

Divide the two numbers:

(6*10^-2)/(2*10^-8)=6/2*(10^-2/10^-8)=3*10^(-2-8)=3*10^-10

I thaink

In order to lure new customers to a credit card, a bank is offering an initial cash back award, plus cash back amounting to a percentage of the value of all purchases made with the card. If p is the value of all purchases made with the card and c is the amount of cash back, which of these equations does the graph represent?

Answers

Answer:I think is A

Step-by-step explanation:

Answer:

A. c = 0.03p + 150

Step-by-step explanation:

I took the test and correct

Use intercepts to graph the linear equation -1/2x+y=-4

Answers

Do you need to switch it around or do something else?
in y=mx+b format the equation is y=1/2x-4. you need to mark -4 on your graph then go up one unit then over two units. then continue to go up 1 over 2 until you get your line

Eu nao sei sb sou burro e vim procurar ajuda mais n estou conseguindo nessa aq

Answers

Answer:

all of em

Step-by-step explanation:

Idk this sorry I can’t help

msp:TeddyBearTed soooo hiiiiii ummmmmmm immm weeiirrrdddd

Answers

Answer:

lol tho :) hehe

Step-by-step explanation:

Answer:

wsp u bored to

Step-by-step explanation:

10000+10010= what is the answer

Answers

Answer:

20010

Step-by-step explanation:

10000+10010=20010

Answer: 20010

Step-by-step explanation:

A student plants bean seeds in two ​

different types of soil and records the ​

heights of the plants in centimeters after ​

two weeks as shown below. ​

​

Soil A: 15, 14, 16, 12, 18​

​

Soil B: 18, 20, 17, 19, 17​

​

Which statement is correct?​

​

​

​

Soil A has a greater mean and a ​greater MAD than soil B.

Soil B has a greater mean and a ​ greater MAD than soil A. ​

Soil A has a greater mean than soil B.​ Soil B has a greater MAD than soil A.

Soil B has a greater mean than soil A.​ Soil A has a greater MAD than soil B. ​

Answers

Soil b has a greater mean soil a has a greater mad
Answer:

Soil B has a greater mean and a ​ greater MAD than soil A.

y - 15 = 3x
-2x + 5y = -3

Answers

Answer:

y=3x+15

y=-3/5+2x/5

Step-by-step explanation:

I think this is what you wanted? I wasn't sure..

your friend claims that it is possible to draw a parabola through any two points with different x coordinates. Is your friend correct? explain your answer ​

Answers

9514 1404 393

Answer:

  yes

Step-by-step explanation:

In general, a (vertical) parabola can be drawn through any 3 non-collinear points having different x-coordinates. For any given pair of points, there are an infinite number of points that are non-collinear with them.

An infinite number of parabolas can be drawn through two points. Your friend is correct.

In an experiment, the probability that even A occurs is 0.2 and the probability that event B occurs is 0.5. If A and B are independent events, which statement is true?

A.
P(A and B) = 0.1

Answers

Answer:

oop

Step-by-step explanation:

The probability of event A and event B will be 0.10. Then the correct option is A.

What is probability?

Its fundamental concept is that someone will nearly surely occur. The proportion of positive events in comparison to the total of occurrences.

Then the probability is given as,

P = (Favorable event) / (Total event)

In an experiment, the probability that event A occurs is 0.2 and the probability that event B occurs is 0.5.

If A and B are independent events. Then the probability is given as,

P(A and B) = P(A) x P(B)

P(A and B) = 0.2 x 0.5

P(A and B) = 0.10

The probability of event A and event B will be 0.10. Then the correct option is A.

More about the probability link is given below.

https://brainly.com/question/795909

#SPJ2

The missing options are given below.

A. P(A and B) = 0.1

B. P(A or B) = 0.1

C. P(A and B) = 0.7

D. P(A or B) = 0.7

Please hurry do this quickly. Thank you.

Answers

Answer:

The answer is A ur welcome

Step-by-step explanation:

I think I know the answer but just to be sure what is 81 + 1/2

Answers

Answer:

81.5

Step-by-step explanation:

Which explains how to find the quotient of the division below?

Negative 3 and one-third divided by StartFraction 4 over 9 EndFraction

Answers

-3 1/3 divided by 4/9 gives you your quotient

Answer:

its a

Step-by-step explanation:

James completed 18 math problems. This is 30% of the problems he has to do. How many total math problems must he complete to be done?

Answers

Answer:

60 = n

Step-by-step explanation:

This problem can be rewritten as:

18 is 30% of what?

% means "out of 100" and of means "multiply"

18 = 30/100 ⋅ n

100/30 ⋅ 18 = 100/30 ⋅30/100 ⋅ n

1800/30 = 100/30 ⋅ 30/100 ⋅ n (both the 30/100 and 100/30 are crossed out here)

60 = n

Ryan must do a total of 60 problems

Having done 18 problems already he has 42 remaining.

Answer:

to many

Step-by-step explanation:

Algebra 2 work please help .

Answers

Answer:

Angles 5 & 8 will be the same as the top.

Angles 1, 4, 5 and 8 equal the same.

Angle 8 = 115°

One less than the product of 3 and a number is 11.

Answers

i put that by accident

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