Question

A boy runs up the stairs, elevating his 102 kg body a vertical distance 2.29 m in a time of 1.32 s at a constant speed. Determine the work done in climbing the staircase and the power generated by him​

Answer 1

Answer:a. 2.30 x 10*3 J

b. 1.73 x 10*3 W

Answer 2

Given,

F=Weight of a boy=102kg

vertical distance=2.29m

Time=1.32s

To find,

W.D. in climbing the staircase=?

power generated=?

Solution,

Work done= force × distance

=102×2.29

=2.33×10³ J

Power generated by the boy=W/ΔT

=2.33×10³ J / 1.32 s

=1.47× 10³watt.