Answer:
The precise point is that gravitational energy is potential energy unless it makes something move, and then the energy is converted to kinetic energy, no work can be done. So a big rock at the top of a hill has no kinetic energy. Its only when it rolls down that work is done, and this can be converted to useful energy.
Explanation:
Answer: 
Explanation:
Given
Mass of the elevator is 
Time period of ascension 
cruising speed 
Distance moved by elevator during this time
Suppose Elevator starts from rest

Distance moved

Gain in Potential Energy is

Average power during this period is

This exercise has redundant information to mislead someone. You have the answer in the third sentence.
If the train completes 60 miles trip in one hour then the average speed is 60mph.
Lamps
electric wiring
extension cords
electrical appliances
power outlets
Answer:

Explanation:
From the question we are told that:
Unimpaired time to hit break 
Drunk time 
Initial Velocity 
Generally the equation for Average velocity is mathematically given by

Therefore


