हिंदी

When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.

Advertisements
Advertisements

प्रश्न

When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.

When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus?

स्पष्ट कीजिए
दीर्घउत्तर
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.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Work, Power and Energy - Intex Question [पृष्ठ ३७]

APPEARS IN

लखमीर सिंग Physics [English] Class 10 ICSE
अध्याय 2 Work, Power and Energy
Intex Question | Q 1. | पृष्ठ ३७
लखमीर सिंग Physics Part 1 [English] Class 9
अध्याय 4 Work and energy
Very Short Answers 1 | Q 79 | पृष्ठ १४९

संबंधित प्रश्न

The kinetic energy of an object of mass m moving with a velocity of 5 m s−1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?


Certain force acting on a 20 kg mass changes its velocity from 5 m s-1 to 2 m s-1. Calculate the work done by the force.


Name the unit of physical quantity obtained by the formula `(2K)/v^2` Where K: kinetic energy, v: linear velocity


When a boy doubles his speed, his kinetic energy becomes


State two factors on which the kinetic energy of a moving body depends.


A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain same?


Write the expression for the kinetic energy of a body explaining the meaning of the symbols used.


A car is moving with a speed of 15 km h-1 and another identical car is moving with a speed of 30 km h-1. Compare their kinetic energy.


A bullet of mass 50 g is moving with a velocity of 500 m s−1. It penetrated 10 cm into a still target and comes to rest. Calculate:

  1. the kinetic energy possessed by the bullet, and
  2. the average retarding force offered by the target.

By how much will the kinetic energy of a body increase if its speed is doubled?


If the speed of a body is halved, what will be the change in its kinetic energy?


Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?


A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the ground? (g = 9.8 m/s2)


On a level road, a scooterist applies brakes to slow down from a speed of 10 m/s to 5 m/s. If the mass of the scooterist and the scooter be 150 kg, calculate the work done by the brakes. (Neglect air resistance and friction)


A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?


If an object has 0 momentum, does it have kinetic energy? Explain your answer.


Find out the form of energy possessed by the following thing.

Water falls


What are the uses of mechanical energy?


When stored water falls down, potential energy of water is converted into ______.


The kinetic energy of a given body depends on the ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×