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PPSC Physics Chapter 1 MECHANICS MCQs With Answers

Question # 1

An object falls freely under gravity the vertical equilibrium of the body inside is

Choose an answer

Stable

Unstable

Neutral

Unknown

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Question # 2

The scalar product of two vectors in negative when

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Vectors are parallel

Vectors are antiparallel

Vectors and perpendicular

Vectors are parallel with same magnitude

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Question # 3

A body is thrown vertically upward with initial velocity 9.8 ms-1 it will reach the height.

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4.9 m

19.9 m

29.4 m

49.2 m

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Question # 4

On the ground the gravitational force on a satellite is W What is the gravitational force on the satellite when at height R/50

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0.96 W

0.98 W

1.04 W

1.02 W

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Question # 5

The gravitational strength on the surface of moon is 1.6 N kg-1 What will be the mass and weight of an object respectively on the surface of the moon.

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10 kg , 1.6 N

10 Kg , 16 N

16 Kg, 10 N

16 kg, 160 N

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Question # 6

A force of 100 N acts on body of mass 5 kg for 10 s. The velocity of the body will be.

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2 ms -1

20 m s-1

200 ms-1

2.000 m s-1

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Question # 7

If two non zero vectors are perpendicular to each other then their scalar product is equal to.

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-1

Infinity

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Question # 8

The dimensions of universal gravitational constant G are.

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[MLT-2]

[ML -2T-2]

[M-1L2T-2]

[ML-1T-1]

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Question # 9

Which of the following is non renewable source of energy.

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Wind

Coal

Hydroelectric

Biomass

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