Kinematics (NEET Physics): Questions 165 - 168 of 233

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Question number: 165

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

A block of metal weighing 2 kg is resting on a frictionless plane. It is stick by a jet releasing water at a rate of 1 kg/s and at a speed of 5 m/s. The initial acceleration of the block will be –

Choices

Choice (4) Response

a.

0

b.

2.5 m/s 2

c.

0.4 m/s 2

d.

5 m/s 2

Question number: 166

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

An engine of mass 5 x 10 4 kg pulls a coach of mass 4 x 10 4 kg. Suppose that there is a resistance of 1 N per 100 kg acting on both coach and engine, and that the driving

force of engine is 4500 N. The acceleration of the engine and tension in the coupling will respectively be

Choices

Choice (4) Response

a.

0.4 m/s 2, 200 N

b.

0.4 m/s 2, 20 N

c.

4 m/s 2, 200 N

d.

0.04 m/s 2, 2000 N

Question number: 167

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

A block of metal weighing 5 kg is resting on a frictionless plane. It is stack by a jet releasing water at a rate of 1 kg/s and at a speed of 10 m/s. The initial acceleration of the block will be –

Choices

Choice (4) Response

a.

5 m/s 2

b.

2 m/s 2

c.

2.5 m/s 2

d.

0

Question number: 168

» Kinematics » Uniform and Non-Uniform Motion

Assertion-Reason▾

Assertion (Ꭺ)

If the net external force on the body is zero then its acceleration is zero.

Reason (Ꭱ)

Acceleration does not depend on force.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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