NEET Physics: Questions 914 - 918 of 2142

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Question number: 914

» Work, Energy and Power » Work Done

MCQ▾

Question

A boy pulls a 5 kg block 20 meters along a horizontal surface at a constant speed with a force directed 45° above the horizontal. If the coefficient of kinetic friction is 0.20, how much work does the boy do on the block?

Choices

Choice (4) Response

a.

11.55 J

b.

115 J

c.

163.32 J

d.

150 J

Question number: 915

» Laws of Motion » Laws of Friction

MCQ▾

Question

A body of mass 600 g slides on a rough horizontal surface. If the frictional force is 8.0 N, the magnitude of the contact force is (g = 10 m/s 2)

Choices

Choice (4) Response

a.

5.0 N

b.

4.0 N

c.

7.0 N

d.

3.0 N

Question number: 916

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

The coefficient of static friction between the two blocks shown in figure is a. and the table is smooth. What maximum horizontal force F can be applied to the block of mass M so that the blocks move together?

Choices

Choice (4) Response

a.

2µg (M + m)

b.

µg (M - m)

c.

µg (M + m)

d.

µg (M + 2m)

Question number: 917

» Laws of Motion » Laws of Friction

MCQ▾

Question

A block is kept on a horizontal table. The table is undergoing simple harmonic motion of frequency 4 Hz in a horizontal plane. The coefficient of static friction between the block and the table surface is 0.70. Find the maximum amplitude of the table at which the block does not slip on the surface (g = 10 ms -2)

Choices

Choice (4) Response

a.

0.04 m

b.

0.03 m

c.

0.011 m

d.

0.02 m

Question number: 918

» Work, Energy and Power » Work Done

MCQ▾

Question

The work done in pulling a body of mass 3 kg along an inclined plane (angle 60°) with coefficient of friction 0.2 through 2 m, will be -

Choices

Choice (4) Response

a.

98.08 J

b.

56.80 J

c.

56.08 J

d.

65.08 J

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