Question

a) 7.7x10 w
b) 8.8x10w
c) 9.5x10 W
d) 10.2x104 w
e) 13.5x10' w
8. A 70 kg sportsman runs up a long flight of stairs in 4s. The vertical hecht of the
is 4.5 m. What will be his power output in watts?
detail explanation ​

Answer 1

Answer:

Explanation:

Given mass of sportsman= 70kg

Time taken to run up stairs = 4s

Height of stairs = 4.5m

Therefore = Power = Work/Time = Energy/Time = mgh/t

                                                      =70*10*4.5/4 = 7.875*10^2 W