A man of mass 60 , kg runs up a flight of 30 | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Given: Mass of the man $m = 60 \, kg$,time taken $t = 40 \, s$,number of steps $= 30$,height of each step $= 20 \, cm = 0.2 \, m$.Total height $h

Vedclass · Accepted Answer

$A$) $90 \, W$

Vedclass · Answer

(A) Given: Mass of the man $m = 60 \, kg$,time taken $t = 40 \, s$,number of steps $= 30$,height of each step $= 20 \, cm = 0.2 \, m$.Total height $h = 30 	imes 0.2 \, m = 6 \, m$.Acceleration due to gravity $g = 10 \, m/s^2$ (taking $g = 10 \, m/s^2$ for simplicity).Work done $W = mgh = 60 	imes 10 	imes 6 = 3600 \, J$.Power $P = \frac{W}{t} = \frac{3600 \, J}{40 \, s} = 90 \, W$.Thus,the power of the man is $90 \, W$.

$A$ man of mass $60 \, kg$ runs up a flight of $30$ steps in $40 \, s$. If each step is $20 \, cm$ high,calculate the power of the man.

Similar Questions

Define power. $A$ boy of mass $45 \, kg$ climbs up $20$ steps in $20 \, s$. If each step is $25 \, cm$ high,calculate the power of the boy used in climbing. (Take $g = 10 \, m s^{-2}$)

State whether the following statement is true or false:
Work and energy have different units.

$A$ person is holding a bucket by applying a vertical force of $10 \,N$. He moves a horizontal distance of $5 \,m$ and then climbs up a vertical distance of $10 \,m$. Calculate the total work done by him. (in $J$)

What is the work done by the earth in moving around the sun?

$A$ person continues to push a heavy mass for some time but fails to move it. What is the work done by him?

Vedclass Test Series

Exam Paper Generator

Online Exam Module