Answer:
Explanation:
Initial speed v = 110 x 1000 / 60 x 60
= 30.55 m /s
If h be height achieved
1/2 m v² = mgh
v² = 2gh
h = v² / 2g
h = 30.55 x 30.55 / 2g
= 47.61 m
b ) Initial kinetic energy
= .5 x 750 x 30.55²
= 349988.43 J
Potential energy achieved at 22 m
= 750 x 9.8 x 22
= 161700 J
Heat energy generated
= loss of energy
= 349988.43 - 161700
= 188288.43 J
c ) distance covered on the slope
= h / sin 2.5
22 / .0436
= 504.58 m
average friction force x 504.58 = work done by friction
= 188288.43
average friction force = 188288.43 / 504.58
= 373.15 N
