Answer:
2250 j
Explanation:
mass = 45 kg
time = 5 sec
number of step =10
length of one step = 50 cm
so total length of step = 10× 50
= 500 cm
converting cm into metre
= 500/100
=5m
Now,
work done = force× displacement
= f×d
= m×g×d (f=m×g)
= 45× 10×5 ( g=10m/s^2)
= 2250 joule
