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Motion, Force, Work and Energy

Authored by LTC Sjbhs

Physics

9th Grade

Used 1+ times

Motion, Force, Work and Energy
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If force and displacement of particle in the direction of the force are doubled. Work would be:

Double

4 Times

Half

1/4 Times

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Burning of coal is an example of conversion of

chemical energy to thermal energy

mechanical energy to heat energy

heat energy to light energy

light energy to heat energy

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

the decrease in the potential energy to a ball of mass 20 kg which falls from a height of 50 cm ,is

100 J
98.1 J
49 J
75 J

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

a ball of mass 2 kg and another of mass 4 kg are dropped together form a 60 feet tall building. after a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of

1 : 2
3 : 2
2 : 1
1 : 1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

which is not a unit energy ?

kilo watt hour

watt
calorie
joule

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

work is said to be done when

A force causes an object to move.
An object is at rest.
A force is applied without movement.
Energy is transferred without displacement.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

a fast wind can turn the blade of a windmill because it possess

kinetic energy
thermal energy
potential energy
gravitational force

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