Question # 1

An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:

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100 m/sec

140 m/sec

1960 m/sec

196 m/sec

Newton published laws of motion in his famous book "principia" in

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1867

1667

1676

1687

In the expression F x t, the force F is

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total force

instantaneous force

average force

all of them

Force is a:

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Scalar quantity

Base quantity

Derived quantity

None of these

An airplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically above a point A on the ground, a bomb is released from it. The bomb strikes the ground, at point B. The distance AB is

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1200 m

0.33 km

3.33 km

33 km

If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have

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different values

same values

zero valves

constant valves

The slopes of the tangent at any point on the curve gives the value of the

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average velocity at that point

instantaneous velocity at that point

average acceleration at that point

instantaneous acceleration at that point

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

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Forward

Backward

Downward

none of these

A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop the vehicle in 10s is

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120 x 10.8 N

180 N

720 N

360 N

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

The horizontal component of a projectile moving with initial velocity of 500 ms^-1at an angle 60° to x-axis is

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500 ms^-1

1000 ms^-1

250 ms^-1

Zero

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

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

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

The velocity given to a body to go out of the influence of earth's gravity is known as:

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Terminal velocity

Orbital velocity

Escape velocity

None of these

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

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