Kinematics-Uniformly Accelerated Motion (NEET Physics): Questions 6 - 10 of 21

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Question number: 6

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

A grind stone starts from rest and has a constant-angular acceleration of 6.0 rad/sec2. The angular displacement and angular velocity, after 4 sec. will respectively be

Choices

Choice (4) Response

a.

32 rad, 64 rad/s

b.

48 rad, 24 rad/s

c.

64 rad, 32 rad/s

d.

16 rad, 32 rad/s

Question number: 7

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

The angular velocity of a particle is given by co = 5t - 3t 2 + 1, the time when its angular acceleration decreases to be zero will be -

Choices

Choice (4) Response

a.

0.25 sec

b.

1.2 sec

c.

0.83 sec

d.

25 sec

Question number: 8

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

The magnitude of the linear acceleration of the particle moving in a circle of radius 10 cm with uniform speed completing the circle in 4 s, will be –

Choices

Choice (4) Response

a.

2.5 π 2 cm/s 2

b.

2.5π cm/s 2

c.

5 π cm/s 2

d.

5 π 2 cm/s 2

Question number: 9

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

The total mass of an elevator with a 80 kg man in it is 1000 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.

78 N, 624 N

b.

624 N, 78 N

c.

624 N, 7800 N

d.

7800 N, 624 N

Question number: 10

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

A force produces an acceleration of 5 m/s 2 in a body and same force an acceleration of 15 m/s 2 in another body. The acceleration produced by the same force when applied to the combination of two bodies will be –

Choices

Choice (4) Response

a.

0.667 m/s 2

b.

3.75 m/s 2

c.

20 m/s 2

d.

10 m/s 2

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