Kinematics-Uniform and Non-Uniform Motion (NEET Physics): Questions 6 - 9 of 15

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Question number: 6

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

The total mass of an elevator with a 50 kg man in it is 500 kg. This elevator moving upward with a speed of 8 m/sec, is brought to rest over a distance of 16m. The tension T in the cables supporting the elevator and the force exerted on the man by the elevator floor will respectively be

Choices

Choice (4) Response

a.

624 N, 3900 N

b.

3900 N, 390 N

c.

620 N, 7800 N

d.

7800 N, 390 N

Question number: 7

» 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: 8

» 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: 9

» 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

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