Law of Conservation of Energy
Trending Questions
Q.
Why do your hands get warm when you rub them together?
- Heat energy transforms into mechanical energy
- Electrical energy transforms into mechanical energy
- Mechanical energy transforms into heat energy
- Mechanical energy transforms into electrical energy
Q.
What kind of energy is possessed in the following situations?
(a) A cocked up spring of an air gun.
(b) A stone lying on the top of a roof.
(c) A fish swimming in water.
(d) A horse running along a level road.
Q.
When a body falls on the ground and stops, the principle of conservation of energy is violated.
- True
- False
Q.
State law of conservation of energy.
Q. State whether the given statement is True or False :
A freely falling object eventually stops on reaching the ground. A part of the kinetic energy on reaching the ground changes into heat energy.
- True
- False
Q.
A stretched rubber band possesses atomic energy.
- True
- False
Q. In _____________, electrical energy is transformed into mechanical energy.
- Electric bell
- Electromagnet
- Mixer grinder
- Transistor
Q.
A cylindrical cell is rolling down an inclined plane. Explain the law of conservation of energy when the cell rolls from the top to the bottom.