Question # 1

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

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1867

1667

1676

1687

Body 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

When two protons are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

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

A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is

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60 kg wt

72 kg wt

48 kg wt

Zero

The path (or trajectory) described by a projectile is

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a parabola

a hyperbola

a circle

a straight line

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

What must be changing when a body is accelerating uniformly?

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the force acting on a body

the velocity of the body

the mass of the body

the speed of the body

Acceleration produced in a body by the force varies

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inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

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

Biomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

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

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Velocity

Displacement

Speed

Distance

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

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

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

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the body rotates

the body speeds up

the mass of the body decreases

the body changes its direction

The linear momentum of the body is defined as

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p=ma

p=1/2ma

p=mv

p=1/2mv

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

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