Advertisements
Advertisements
Question
Explain the types of mechanical energy.
Solution
The energy possessed by an object due to its position is called mechanical energy.
Mechanical energy can be classified into two;
- Kinetic energy
- Potential energy
- Kinetic energy: Energy possessed by a moving object is known as kinetic energy. It is also known as the energy of motion.
Eg: Moving car, cricket ball bowled by a player, bullet coming out of a gun. - Potential energy: Energy possessed by an object which is at rest is known as potential energy. It is also known as the store energy of position.
Eg: Objects lifted above, stone in the stretched rubber, water in the dam.
APPEARS IN
RELATED QUESTIONS
An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.
Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?
Give reasons for the following A horse and a dog are running with the same speed. Which one of them has more kinetic energy than the other.
A body of mass 10 kg is moving with a velocity 20 m s-1. If the mass of the body is doubled and its velocity is halved, find:
- the initial kinetic energy, and
- the final kinetic energy.
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
By how much will the kinetic energy of a body increase if its speed is doubled?
A body of 2 kg falls from rest. What will be its kinetic energy during the fall at the end of 2 s? (Assume g = 10 m/s2)
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
When stored water falls down, potential energy of water is converted into ______.
When a bell fixed on a cycle rings, then the energy conversion that takes place is ______.
