Question # 1

Work is product of:

Choose an answer

Force and velocity

Heat and energy

Force and displacement

None of these

Work is a always done on a body when

Choose an answer

A force acts on it

It moves through certain distance

None of A or B is correct

Both A and B are correct

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:

Choose an answer

1.25 J

12.5 J

125 J

None of these

Most of the geysers occur in:

Choose an answer

Volcanic regions

Magnetic regions

Northern region

None of these

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Choose an answer

mgh

Its wight

Weight X height

Zero

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Choose an answer

Zero

10.2 J

100 J

980 J

Tick the conservative force

Choose an answer

Tension in a string

Air resistance

Elastic spring

Frictional force

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Choose an answer

0.5 Kwn

2 Kwh

1 Kwh

None of these

The work done by a force keeping an object in circular motion with constant speed is:

Choose an answer

Zero J.

0.1 J

1 J

0.01 J

Work done on a body by gravity in lifting it up to certain height is

Choose an answer

Maximum

Minimum

Zero

Negative

Work done is maximum when angle between force and displacement is:

Choose an answer

0°

90°

180°

None of these

Which force is not a conservative force?

Choose an answer

Frictional force

Gravitational force

Electric force

Elastic spring force

Which of the following is not a unit of power:

Choose an answer

J-sec

Watt

N m/sec

Horsepower

The space around the earth within it exerts a force of attraction on other bodies of known as:

Choose an answer

Nuclear field

Conservative field

Electric field

Gravitational field

When force and displacement are perpendicular to each other than work is equal to

Choose an answer

Unity

Infinity

Zero

-Fd

The types of mechanical energy is/are:

Choose an answer

Kinetic energy

Potential energy

Both of these

None of these

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 4 Work and Energy Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer