Question # 1

The vertical component of velocity of a projectile during its motion is minimum

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at the time of projection

at the highest point

just before hitting the plane of projection

all of them

A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of

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3 s

5 s

7 s

9 s

Distance traveled by a body falling from rest in the first, second and third second is in the ration of

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1 : 2 : 3

1 : 3 : 5

1 : 4 : 9

None of the above

The vertical and horizontal range will be equal id angle of projection is

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76°

45°

60°

120°

Essential characteristic of equilibrium is

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Momentum equal to zero

Acceleration equal to zero

Kinetic energy equal to zero

Velocity equal to zero

Earth is considered to be

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a non-inertial frame

an inertial frame

an accelerated frame

none of the above

The motion of a body in a straight line is the motion in

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one dimension

two dimension

three dimension

four dimension

Newton's first law is also called:

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Law of torque

Law of force

Law of inertia

None of these

A body whose momentum is constant must have constant

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Acceleration

Velocity

Force

None of these

Tick the conservation force:

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Tension in a string

Air resistance string

Elastic spring force

Frictional force

A ball of mass m moving with uniform speed collides elastically with another stationary ball. The incident ball will lose maximum kinetic energy when mass of the stationary ball is

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m

2 m

4 m

Infinity

The direction of the acceleration is the same as that of

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speed

velocity

both of them

none of them

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

If a ball comes back to its starting point after bouncing off the wall several times, then its

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total displacement is zero

average velocity is zero

none of them

both of them

A body of mass 1.0 kg is falling with an acceleration of 10 m/s². Its apparent weight will be (g=10 m/s²)

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1.0 kg wt

2.0 kg wt

0.5 kg wt

Zero

The projectile motion is composed of

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horizontal motion only

vertical motion only

horizontal and vertical motion

none of them

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