Question # 1

The consumption of energy by a 1000 watt heter in half an hour is:

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5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 Kg

3 Kg

4 Kg

8 Kg

If d is the displacement of the body in time t, then its average velocity will be

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V_av= d x t

V_{av = t/d}

V_{av = d/t}

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

A rocket carries its own fuel in the form of

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liquid only

liquid or solid

liquid and solid

liquid or solid and oxygen

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

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

Linear momentum is a

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fixed quantity

constant quantity

scalar quantity

vector quantity

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

Velocity is a

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scalar quantity

vector quantity

constant quantity

none of them

When a shell explodes in mid-air, its fragments fly off in

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only one direction

in two direction

different directions

a particular direction

A ball is dropped from a certain height and another ball is projected horizontally from the same point. Which of the following statement is correct?

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Both hit the ground at the same veloctiy

Both hit the ground at the same speed

The change of velocity during the path for both balls is the same

The change of speed during the path for both balls is the same

The expression F x t is called impulse if the time 't' is

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zero

very large

very small

infinite

Acceleration of a body is positive, if the velocity of the body is

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constant

increasing

decreasing

none of them

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

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