Kinematics (NEET Physics): Questions 213 - 216 of 229

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Question number: 213

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The rate of burning of fuel in a rocket is 60 gm/sec. and comes out with and velocity 5 x 10 3 m/s. The force exerted by gas on rocket will be –

Choices

Choice (4) Response

a.

2.5 x l0 4 N

b.

2.5 x l0 6 N

c.

300 N

d.

200 N

Question number: 214

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A 30 g bullet pierces through a plate of mass m 1 = 1 kg and then comes to rest inside a second plate of mass m 2 = 1.5 kg. It is found that the two plates, initially at rest, now move with equal velocities. The percentage loss in the initial velocity of bullet when it is between m1 and m 2. (Neglect any loss of material of the bodies, due to action of bullet. ) will be -

Choices

Choice (4) Response

a.

25.67%

b.

46.45%

c.

20.68%

d.

39.525%

Question number: 215

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

Three equal weights of mass m each are hanging on a string passing over a fixed pulley as shown in fig. The tensions in the string connecting weights A to B and B to C will respectively be -

Three equal weights of mass m each are hanging on a string

Three Equal Weights of Mass M Each Are Hanging on a String

Pulley with 3 weights on the string

Choices

Choice (4) Response

a.

23mg,23mg

b.

43mg,23mg

c.

23mg,43mg

d.

32mg,34mg

Question number: 216

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A bullet of mass 0.01 kg travelling at a speed of 500 m/s strikes a block of mass 2 kg, which is suspended by a string of length 5 m. The center of gravity of the block is found to rise a vertical distance of 0.1 m. The speed of the bullet after it emerges from the block will be -

Choices

Choice (4) Response

a.

14 m/s

b.

1.4 m/s

c.

220 m/s

d.

110 m/s

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