A man is riding on a cycle with velocity 7.2 km/hr up a hill having a slope 1 in 20. The total mass of the man and cycle is 100 kg. The power of the man is
98 W
v=7.2kmh=7.2×518=2 m/s
Slope is given as 1 in 20
∴sinθ=120
When man and cycle moves up then component of weight opposes it motion i.e.
F=mg sinθ
So power of the man P=F×v=mg sinθ×v
=100×9.8×(120)×2 = 98 Watt