Questions
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.
detailed solution
Correct option is B
Internal forces on a system of interacting particles cancel out as they are action reaction pairs. Hence internal forces cannot produce acceleration of centre of mass. So they cannot change momentum of the system as a whole. But since net internal force on a particle is not zero, velocity i.e, K.E of particle can change.Talk to our academic expert!
Similar Questions
Figures I, II, III and IV depict variation of force with time. Select the figure(s) that depicts minimum impulse delivered.
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