Answer:
it shows examples of types of forces
The speed of the bus is 40 km/hr so this means the bus is travelling at a speed of 40 km per hour.
Potential Energy = mgh = 1
m= 1
g= 9.8
mgh = 1 x 9.8 x h = 1
height = 1/9.8
height = 0.102 m
