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Internal forces can change...

Internal forces can change

A

the linear momentum but not the kinetic energy

B

the kinetic energy but not the linear momentum

C

linear momentum as well as kinetic energy

D

neither the linear momentum nor the kinetic energy.

Text Solution

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The correct Answer is:
B
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Choose correct statement (A) The position of centre of mass of a system is dependent on the choice of coordinate system. (B) Newton's second law of motion is applicable to the centre of mass of the system (C) Internal forces can not change the state of centre of mass (D) Internal forces can change the state of centre of mass.

(A) : Acceleration of centre of mass depends only on the external force not on the internal forces. (R ) : Internal forces are the force exerted by the particles on one another according to Newton.s third law they constitutes action, reaction pair and cancel each other.