NEET Physics: Questions 846 - 848 of 2142

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Question number: 846

» 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: 847

» Laws of Motion » Force and Inertia

MCQ▾

Question

A body of mass 50kg resting on a smooth inclined plane is connected by a massless inextensible string passing over a smooth pulley, at the top of the inclined plane have another mass of 40 kg as shown in the figure. The distance through which 50 kg mass fall in 10 sec will be - (The angle of the inclined plane is 30°)

Body of mass 50kg is on rest at inclined plane

Body of Mass 50kg Is on Rest at Inclined Plane

Formation of pulley system on the inclined plane

Choices

Choice (4) Response

a.

1.304 m

b.

81.5 m

c.

13.04 m

d.

1.63 m

Question number: 848

» 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.

Equation

b.

Equation

c.

Equation

d.

Equation

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