NSO Level 1- Science Olympiad (SOF) Class 8: Questions 815 - 819 of 1076

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Question number: 815

» Force and Pressure

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MCQ▾

Question

Which of the following is not an example of contact force?

Choices

Choice (4) Response

a.

Muscular force

b.

Gravity

c.

Friction

d.

Question does not provide sufficient data or is vague

Question number: 816

» Friction

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MCQ▾

Question

Which of the following can be considered as a surface with zero friction?

Choices

Choice (4) Response

a.

A marble floor

b.

A glass floor

c.

A granite floor

d.

None of the above

Question number: 817

» Force and Pressure

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MCQ▾

Question

Weight of an object is the product of its mass and gravity. The gravitational force of earth has a fixed value. It is same for all objects irrespective of their size or shape. Weight of objects change with size and hardness. The explanation to this statement is

Choices

Choice (4) Response

a.

Weight of an object is the force with which earth attracts it towards its centre

b.

Mass changes with size and hardness

c.

None of the above

d.

Question does not provide sufficient data or is vague

Question number: 818

» Force and Pressure

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MCQ▾

Question

Pick out the examples where force applied is used to pull the object.

Choices

Choice (4) Response

a.

Moving a heavy stone

b.

Opening a door from outside

c.

Kicking a foot ball

d.

Moving a horse cart

Question number: 819

» Force and Pressure

Edit
MCQ▾

Question

Which of the statement is true about pressure?

Choices

Choice (4) Response

a.

It is directly proportional to the area of application of force

b.

It is directly proportional to the force applied

c.

None of the above

d.

All of the above

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