Kinematics (NEET Physics): Questions 188 - 191 of 229

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Question number: 188

» Kinematics » Uniformly Accelerated Motion

Assertion-Reason▾

Assertion (Ꭺ)

In figure the ground is smooth and the masses of both the blocks are different. Net force acting on each of block is not same.

Reason (Ꭱ)

Acceleration of the both blocks will be different.

Net force acting on each of block

Net Force Acting on Each of Block

Finding force and acceleration on both blocks

Choices

Choice (4) Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

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

Question number: 189

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A 20 g bullet pierces through a plate of mass m1 = 1 kg and then comes to rest inside a second plate of mass n1 = 2.98 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%

b.

30%

c.

45%

d.

20%

Question number: 190

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

An automobile of mass m accelerates from rest If the engine supplies a constant power P, the velocity at time t is given by –

Choices

Choice (4) Response

a.

V=ptm

b.

V=2ptm

c.

V=ptm

d.

V=2ptm

Question number: 191

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

A particle of mass m is moving in a horizontal circle of radius r, under a centripetal force equal to (-k/r 2), where k is a constant. The total energy of the particle is –

Choices

Choice (4) Response

a.

k2r

b.

k2r

c.

kr

d.

k2r

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