Work Energy And Power

Physics
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A particle of mass is moving with speed . It is stopped by a force in distance . If the stopping force is then 

A
work done by stopping force in second case will be same as that in first case
B
work done by stopping force in second case will be times of that in first case
C
work done by stopping force in second case will be of that in first case
D
work done by stopping force in second case will be  of that in first case
Hard
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A particle of mass 'm' strikes a wedge of mass 'M' horizontally as shown in the figure.
STATEMENT-1 : If the collision is perfectly inelastic then, it can be concluded that the particle sticks to the wedge.
STATEMENT-2 : In perfectly inelastic collision velocity of both bodies is same along common normal just after the collision.

A
Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.
B
Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1.
C
Statement-1 is True, Statement-2 is False.
D
Statement-1 is False, Statement-2 is True.
Hard
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The balls, having linear momenta and , undergo a collision in free space. There is no extemal force acting on the balls. Let and be their final momenta. The following option(s) is (are) NOT ALLOWED for any non-zero value of and .

A
;

B
;

C
;

D
;

Hard
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