Question

A boy of mass 50 kg runs
up a staircase of 45 steps in 9 s. If the
height of each step is 15 cm, find his
power. Take g = 10 m s2.​

Answer 1

Answer:

375ᴡ

Explanation:

Weight of boy

mg= 50kg ×10 m s-¹

= 500N

Height of the staircase,

h= 45 × 15 / 100 m

= 6.75 m

Time taken to climb , t = 9s

P= Work done / time taken

= mgh/t

= 500N × 6.75 m / 9s

= 375 W

Answer 2

Answer:

hope it helps.....................