NEET Physics: Questions 836 - 840 of 2098

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Question number: 836

» 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: 837

» 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

Question number: 838

» Work, Energy and Power » Work Done

MCQ▾

Question

The work done in lifting water from a well of depth 6 m using a bucket of mass 0.5 kg and volume 2 liter, will be

Choices

Choice (4) Response

a.

98 J

b.

117.6 J

c.

73.5 J

d.

147 J

Question number: 839

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A slow moving electron collides elastically with a hydrogen atom at rest. The initial and final motions are along the same straight line. What fraction of electron’s kinetic energy is transferred to the hydrogen atom? The mass of hydrogen atom is 1850 times the mass of electron.

Choices

Choice (4) Response

a.

2.17 %

b.

21.7%

c.

0.217%

d.

0.0217 %

Question number: 840

» Laws of Motion » Laws of Friction

MCQ▾

Question

The coefficient of static friction between a block of mass m and an inclined plane is n s = 0.3. What can be the maximum angle 9 of the inclined plane with the horizontal so that the block does not slip on the plane?

Choices

Choice (4) Response

a.

tan -1 (0.3)

b.

tan -1 (0.4)

c.

tan -1 (0.1)

d.

tan -1 (0.2)

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