9 CBSE Quiz on Work and Energy

Welcome to your 9 CBSE QUIZ-4 WORK AND ENERGY (SCIENCE)

Good luck for the Quiz!!!

Name

Email ID

Contact No.

The work done on an object does not depend upon the:

Displacement

Force applied

Angle between force and displacement

Initial velocity of the object

None

When a body falls freely towards the earth, then its total energy:

Increase

Decreases

Remains constant

First increase and then decreases

None

A car is a accelerated on leveled road and attains a velocity 4 times of its initial velocity. In the process the potential energy of the car:

Does not change

Becomes twice to that of initial

Becomes 4 times that of initial

Becomes 16 times that of initial

None

A girl carrying a school bag of 3 kg mass on her back and moves 200 m on a leveled road. The work done against the gravitational force will be (g = 10ms^-2)

In case of negative work the angle between the force and displacement is:

0°

45°

90°

180°

None

A body is falling from a height h. After it has fallen a height h/2, it will possess:

Only potential energy

Only kinetic energy

Half potential and half kinetic energy

More kinetic and less potential energy

None

An iron sphere of mass 10kg has the same diameter as an aluminium sphere of mass is 3.5kg. Both spheres are dropped simultaneously from a tower. When they are 10m above the ground, they have the same:

Acceleration

Momenta

Potential energy

Kinetic energy

None

Water stored in a dam possesses:

No energy

Electrical energy

Kinetic energy

Potential energy

None

Work done -

is always positive

is always negative

can be positive, negative or zero

none of these

None

10.

Which one of the following is not the unit of energy?

Joule

Newton metre

Kilowatt

Kilowatt hour

None

Time's up

Time is Up!

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