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PPSC Physics Chapter 1 MECHANICS MCQs With Answers

Question # 1

Which quantity has different units from the other three.

Choose an answer

Density x volume x velocity

Rate of change of momentum

Young's modulus x area

Weight

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Question # 2

A shell explodes and many pieces fly off in different directions, which of the following is conserved.

Choose an answer

Momentum

K.E.

Momentum and K.E

Neither momentum nor K.E.

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Question # 3

Angular acceleration is produced due to

Choose an answer

Centripetal force

Torque

Force

Mass

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Question # 4

The horizontal range is equal for the angles.

Choose an answer

30 ^o and 45 ^o

30 ^oand 60 ^o

45 ^o and 90 ^o

60 ^oand 75 ^o

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Question # 5

A body of mass 8 kg moves along a circle of radius 4 m with constant speed of 88 m s-1 The centripetal force on the body is.

Choose an answer

10 N

128 N

48 N

148 N

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Question # 6

Restoring force in the SHM is

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Centripetal

Frictional

Conservative

Non conservative

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Question # 7

Which of the following is not necessary for work to be done.

Choose an answer

A constant force

An applied force

A displacement

Force component along the displacement

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Question # 8

If the resultant of two forces, each of magnitude F have the magnitude F, angle between the forces will be.

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30^o

80^o

90 ^o

120 ^o

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Question # 9

A mason of 9.8 N weight is climbing on a 20 m high ladder The P.E. of mason at the middle of the ladder is.

Choose an answer

98 J

196 J

960 .4 J

1920 .8 J

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