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

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## Question number: 855

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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

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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

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MCQ▾

### Question

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

### 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

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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

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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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