# NEET Physics: Questions 940 - 943 of 2142

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## Question number: 940

MCQ▾

### Question

A tennis ball dropped from a height of 7 m rebounds only 1.6 f meter after hitting the ground. What fraction of energy is lost in the impact?

### Choices

Choice (4) Response

a.

2.45

b.

0.466

c.

1.26

d.

0.771

## Question number: 941

MCQ▾

### Question

A body of mass m is released from the top of a rough inclined plane as shown in figure. If the frictional force be F, then body will reach the bottom with a velocity

### Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

## Question number: 942

MCQ▾

### Question

The mass of a rocket is 600 kg and the relative velocity of the gases ejecting from it is 250 m/s with respect to the rocket. The rate of burning of the fuel in order to give the rocket an initial acceleration 40 m/s 2 in the vertically upward direction (g = 10 m/s 2), will be –

### Choices

Choice (4) Response

a.

120 kg/s

b.

10 kg/s

c.

60 kg/s

d.

72 kg/s

## Question number: 943

MCQ▾

### Question

Consider the situation shown in figure. The wall is smooth but the surfaces of A and B in contact are rough in equilibrium the friction on B due to A -

### Choices

Choice (4) Response

a.

The system cannot remain in equilibrium

b.

is downward

c.

is upward

d.

Is zero

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