Kinematics (NEET Physics): Questions 221 - 225 of 229

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Question number: 221

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The rate of burning of fuel in a rocket is 30 gm/sec. and comes out with and velocity 6 x 10 3 m/s. The force exerted by gas on rocket will be –

Choices

Choice (4) Response

a.

200 N

b.

300 N

c.

180 N

d.

2.5 x l0 6 N

Question number: 222

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

Consider the double Atwood’s machine as shown in the figure. What is acceleration of the masses?

 Double atwood machine

Double Atwood Machine

Mass acting on double atwood machine

Choices

Choice (4) Response

a.

g/3

b.

g/4

c.

g

d.

g/2

Question number: 223

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A body of mass 10 kg moving with a velocity of 5 m/s, rebounds on a wall with same velocity. The impulse on the body is -

Choices

Choice (4) Response

a.

100 Ns

b.

30 Ns

c.

120 Ns

d.

60 Ns

Question number: 224

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A cricket ball of mass 100 g is moving with a velocity of 10m/sec and is hit by a bat so that the ball is turned back with a velocity of 20 m/sec; the force on the ball acts for 0.01 sec, then the average force exerted by the bat on the ball will be

Choices

Choice (4) Response

a.

480 N

b.

40 N

c.

200 N

d.

48 N

Question number: 225

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

Two blocks of masses 5 kg and 3 kg connected by a rope of mass 2 kg are resting on frictionless floor. If a constant force of 40 N is applied to 6 kg block, tension in the rope at A, B, and C will respectively be –

Choices

Choice (4) Response

a.

30N, 25N, 20N

b.

28N, 24N, 20N

c.

25N, 30N, 20N

d.

30N, 20N, 25N

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