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Internal forces can change...

Internal forces can change

A

the linear momentum but not the kinetic energy of the system

B

the kinetic energy but not the linear momentum of the system

C

linear momentum as well as kinetic energy of the system

D

neither the linear momentum nor the kinetic energy of the system

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The correct Answer is:
B
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Choose the correct statement regarding a system of particles. Internal forces can change the kinetic energy of the system without changing system's momentum O Impulse can be defined as a very large force that acts for a very short time and causes finite change in momentum. Internal forces can change the potential energy of the system without changing system's momentum Internal forces can change the mechanical energy of the system without changing system's momentum.

If only an external force can change the momentum of the centre of mass of an object, how can be internal force of an engine accelerate a car?

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Internal forces acting in a system of particle can change

Internal forces acting in a system of particle can change

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