Question # 1

If two bodies of equal masses moving in the same direction collide elastically, then their velocities.

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Are added

Are subtracted

Do not change

Are exchanged

Distance covered by a freely falling body in 2 sec will be

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4.9 m

19.6 m

29.2 m

44.1 m

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude, then their magnitudes are

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3, 15

4, 14

5, 13

6, 12

The short distance between two points direction from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

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

If the objects of different masses move with the same velocity, then it is more difficult to stop the

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lighter of the two

massive of the two

any one of them

both of them

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

The consumption source if energy is:

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Energy from blomass

Hydroelectric energy

Geothermal energy

None of these

The linear momentum of the body is defined as

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p=ma

p=1/2ma

p=mv

p=1/2mv

Velocity of a body changes if

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direction of the body changes

speed of the body changes

neither speed nor direction changes

either speed or direction changes

Change in momentum is one second is called:

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Impulse

Force

Energy

Work

The velocity of a projectile is maximum

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at the point of projection

just before striking the ground

at none of them

at both of them

During the upward motion of the projectile, the vertical component of velocity.

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Decreases

Increases

Remains constant

None of these

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

Laws of motion are not valid in a system which is

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inertial

non-interial

at rest

moving with uniform velocity

The velocity of a body at any instant of its motion is known as

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average velocity

instantaneous velocity

uniform velocity

none of them

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

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