# NSO Level 1- Science Olympiad (SOF) Class 8: Questions 802 - 806 of 1175

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## Question 802

### Question

MCQ▾

Force acting per unit area is called

### Choices

Choice (4)Response

a.

Gravity

b.

Pressure

c.

Weight

d.

Question does not provide sufficient data or is vague

## Question 803

### Question

MCQ▾

The force required to lift a stone of mass from the ground would be

### Choices

Choice (4)Response

a.

196 Newton

b.

19.6 Newton

c.

1960 Newton

d.

1.96 Newton

## Question 804

### Question

MCQ▾

Porters make use of trolleys to carry heavy luggage in a railway stations than carrying on their head. The reason is

### Choices

Choice (4)Response

a.

Thrust decreases with area

b.

Wheels help to reduce friction

c.

Thrust acting will be less on a trolley than head

d.

All a., b. and c. are correct

## Question 805

### Question

MCQ▾

Weight of an object on Earth is th in moon. This is because

### Choices

Choice (4)Response

a.

The gravity of earth is equal to that of moon

b.

The gravity of earth is th of that of moon

c.

The gravity of earth is 60 times that of moon

d.

The gravity of earth is 6 times that of moon

## Question 806

### Question

MCQ▾

Ball bearings are used in fans. The reason behind this is

### Choices

Choice (4)Response

a.

Balls reduce friction

b.

Balls increase friction

c.

Balls reduce the speed

d.

Question does not provide sufficient data or is vague

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