Work, Energy and Power (NEET Physics): Questions 21 - 23 of 61

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Question number: 21

» Work, Energy and Power » Elastic and Inelastic Collisions

Assertion-Reason▾

Assertion (Ꭺ)

A particle of mass m strikes a wedge of mass M horizontally as shown in the figure. If collision is perfectly inelastic then, it can be concluded that the particle sticks to the wedge.

Particle of mass m strikes a wedge of mass M horizontally

Particle of Mass M Strikes a Wedge of Mass M Horizontally

In above we figure we show that the triangle, and the particle have mass m and M.

Reason (Ꭱ)

In perfectly inelastic collision velocity of both bodies is same along common normal just after collision.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 22

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A body of mass M splits into two parts αM and (1 - a) M by an internal explosion, which generates kinetic energy T After explosion if the two parts move in the same direction as before, their relative speed will be –

Choices

Choice (4) Response
a.

T2(1α)M

b.

2Tα(1α)M

c.

2T(1α)M

d.

T(1α)M

Question number: 23

» Work, Energy and Power » Work Done

MCQ▾

Question

A particle moving in a straight line is acted by a force, which works at a constant rate and changes its velocity from u to v in passing over a distance x. The time taken will be –

Choices

Choice (4) Response
a.

32x(v2+u2v3u3)

b.

X=Vuv2+u2

c.

X=Vuv2+u2

d.

X(vu)

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