Question # 1

Which of the following statements for an object in equilibrium is not true?

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The object must be at rest

The object can be at rest

The object is moving at constant speed

The acceleration of the object is zero

When brakes are applied to a fast moving car, the passenger will be thrown:

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Forward

Backward

Downward

none of these

The projectile attains maximum horizontal range when it is projected at an angle of

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30°

45°

60°

75°

Linear momentum is a

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fixed quantity

constant quantity

scalar quantity

vector quantity

A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is

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37.5 km/h

10 km/h

42 km/h

40 km/h

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

Bodies which falls freely under gravity provides good example of motion under:

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Uniform acceleration

Non-uniform acceleration

Uniform velocity

None of these

A 5 kg mass is falling freely, the force acting on, it will be

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19.6 N

9.8 N

5 N

Zero

A dirty carpet is to be cleaned by heating. This is in according with______law of motion.

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First

Second

Third

None of these

A certain force gives an acceleration of 2 m/sec²to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:

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0.5 m/sec²

5 m/sec²

1.5 m/sec²

9.8 m/sec²

When body moves with increasing acceleration, its velocity time graph is a

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straight line

horizontal straight line

vertical straight line

curve

Unit of impulse in

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Newton

Kg m

Kg m/s

Joule

When a bicycle is in motion but not pedaled, the force of friction exerted by the ground on the two wheels is such that it acts

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In the backward direction on the front wheel and in the forward direction on the rear wheel

In the forwards directions on the front wheel and in the backward direction on the rear wheel

In the forward direction on both the wheels

In the backward direction on both the wheels

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

Work done along a closed path in a gravitational force is:

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maximum

Minimum

Zero

Unity

A man fires a bullet of mass 200 g at a speed of 5 m/s. The gun is of one kg mass. By what velocity the gun rebounds backwards?

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0.1 m/s

10 m/s

1 m/s

0.01 m/s

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ECAT Physics Chapter 3 Motion and Force Online Test MCQs With Answers

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