Question

a boy weighing 350N climbs up 30 steps each 20 cm high in 1 minute . calculate 1- the work done ,and 2- the power spent.

Answer 1

Answer:

Question

a boy weighing 350N climbs up 30 steps each 20 cm high in 1 minute . calculate 1- the work done ,and 2- the power spent.

Answer

Given

Weight = 350 N

Height = height of one step x no. of steps

= 0.2 x 30

= 6 m

Work done = P.E = mgh

Work done = 350 x 6 = 2100 J

Power = Work done/Time

= 2100/60 [ 1 min = 60 sec.]

= 35 W

Explanation:

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Answer 2

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