Question # 1

A train cover 90 km in half an hour. the time taken by it to travel 15 km will be:

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20 minutes

48 minutes

10 minutes

5 minutes

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

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a rocket

an aeroplane

a projectile

a ballon

At the top of the trajectory of a projectile the acceleration is

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The maximum

The minimum

Zero

g

If the velocity time graph is a straight line parallel to the time-axis, then it means:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of these

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

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Forward

Backward

Downward

none of these

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

Inertia mass and gravitational mass are

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opposite

identical

identical when there is no friction

all of them

When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.

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Becomes half

Becomes zero

Ramains same

Becomes double

The instantaneous velocity is define as the limiting value of Δd/Δt on the time intervalΔt approaches to

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zero

maximum

minimum

infinity

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

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Zero

g

-g

V + g

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be

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40 km/h

48 km/h

50 km/h

60 km/h

Flight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

Two bodies of masses 1 kg and 5 kg are dropped gently form the top of a tower. A a point 20 cm from the ground both the bodies will have the same

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Momentum

Kinetic energy

Velocity

Total energy

The product of force and time is called change in:

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Momentum

Impulse

Force

Both a and b

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

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