NSO Level 1- Science Olympiad (SOF) Class 8: Questions 855 - 859 of 1076

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Question number: 855

» Force and Pressure

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MCQ▾

Question

Earth attracts all objects towards its centre with a force. This force is called

Choices

Choice (4)Response

a.

Friction

b.

Gravity

c.

Muscular force

d.

Contact force

Question number: 856

» Friction

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MCQ▾

Question

The minimum amount of force required to overcome the force of friction is called

Choices

Choice (4)Response

a.

Fluid friction

b.

Rolling friction

c.

Sliding friction

d.

Static friction

Question number: 857

» Friction

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MCQ▾

Question

In this figure, a boy is trying to move a cupboard. The friction developed here is called

Image of Static friction

Image of Static Friction

Choices

Choice (4)Response

a.

Static friction

b.

Rolling friction

c.

Sliding friction

d.

Question does not provide sufficient data or is vague

Question number: 858

» Friction

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MCQ▾

Question

We use a towel to open a tight bottle cap. This is because

Choices

Choice (4)Response

a.

It provides better grip and makes the work easier

b.

Rough surface of towel helps in increasing friction

c.

Both a. and b. are correct

d.

None of the above

Question number: 859

» Sound

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MCQ▾

Question

Women and children have sweet voice while men have a rough voice. The reason is

Choices

Choice (4)Response

a.

The vocal cord of men, women and children are equal in size

b.

The vocal cord of a woman or a child is larger than a man

c.

The vocal cord of a man is larger than that of a woman and a child

d.

Question does not provide sufficient data or is vague

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