Advertisements
Advertisements
प्रश्न
When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.
Advertisements
उत्तर
The kinetic energy of a ball thrown inside a moving bus depends on the speed of the bus because the kinetic energy is directly proportional to the square of the speed of the moving ball. The speed of the bus adds up to the speed with which the ball is thrown inside the bus. Hence, more the speed of bus, higher will be the ball’s kinetic energy.
APPEARS IN
संबंधित प्रश्न
Write an expression for the kinetic energy of an object.
Two toy-cars A and Bof masses 200 g and 500 g respectively are moving with the same speed. Which of the two has greater kinetic energy?
Write the expression for the kinetic energy of a body explaining the meaning of the symbols used.
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.
If the speed of a body is halved, what will be the change in its kinetic energy?
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
What are the uses of mechanical energy?
The energy possessed by a cricket ball bowled by a player is ______.
A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:
- the work done by the engine.
- the power of the engine.
The kinetic energy of a given body depends on the ______.
