Test: Force & Pressure- 3

# Test: Force & Pressure- 3

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## 20 Questions MCQ Test General Science(Prelims) by IRS Divey Sethi | Test: Force & Pressure- 3

Test: Force & Pressure- 3 for Class 8 2022 is part of General Science(Prelims) by IRS Divey Sethi preparation. The Test: Force & Pressure- 3 questions and answers have been prepared according to the Class 8 exam syllabus.The Test: Force & Pressure- 3 MCQs are made for Class 8 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Force & Pressure- 3 below.
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Test: Force & Pressure- 3 - Question 1

### Which of the following actions describe pushing force?

Detailed Solution for Test: Force & Pressure- 3 - Question 1

Kicking is a pushing action while the others are pulling actions.

Test: Force & Pressure- 3 - Question 2

### Which of the following is NOT a force?

Detailed Solution for Test: Force & Pressure- 3 - Question 2

Chemical energy is not a force.

Test: Force & Pressure- 3 - Question 3

### A force is applied on an object in the direction of its motion. What is the effect of force on the object?

Detailed Solution for Test: Force & Pressure- 3 - Question 3

Since, the force is applied in the direction of motion of the object, the speed of the object will increase.

Test: Force & Pressure- 3 - Question 4

If no force acts on a body at rest, then what effect can be observed?

Detailed Solution for Test: Force & Pressure- 3 - Question 4

In the absence of a force, a body will remain at rest (static object) or move with uniform velocity.

Test: Force & Pressure- 3 - Question 5

Which of the following examples describe the change of shape on applying force?

Detailed Solution for Test: Force & Pressure- 3 - Question 5

We apply certain force to tear a paper. The shape of the paper changes after it is repeatedly torn into pieces.

Test: Force & Pressure- 3 - Question 6

Which of the following effects is caused by frictional force?

Detailed Solution for Test: Force & Pressure- 3 - Question 6

Frictional force between two surfaces tends to decrease the speed of a moving object.

Test: Force & Pressure- 3 - Question 7

Which of the following is a non-contact force?

Detailed Solution for Test: Force & Pressure- 3 - Question 7

The electrostatic force is a non-contact force.

Test: Force & Pressure- 3 - Question 8

What causes the atmospheric pressure?

Detailed Solution for Test: Force & Pressure- 3 - Question 8

Atmospheric pressure is caused by the weight of air molecules surrounding the earth.

Test: Force & Pressure- 3 - Question 9

How does the pressure exerted by a liquid change?

Detailed Solution for Test: Force & Pressure- 3 - Question 9

The pressure exerted by a liquid increases with depth.

As we go we deeper in a liquid the pressure of liquid increases. As the depth of liquid increases the weight of liquid column pushing down from above increases and hence the pressure also increases.

Test: Force & Pressure- 3 - Question 10

What is thrust equal to?

Detailed Solution for Test: Force & Pressure- 3 - Question 10

Thrust is the total force applied on a given area. It is given as the product of pressure and area.

Test: Force & Pressure- 3 - Question 11

A When does a body float on water?

Detailed Solution for Test: Force & Pressure- 3 - Question 11

The weight of a body is balanced by the upthrust of water. Hence, the net force acting on a body is zero and so this helps the body float.

Test: Force & Pressure- 3 - Question 12

In which of the following cases the net force is NOT equal to zero?

Detailed Solution for Test: Force & Pressure- 3 - Question 12

When a ball is falling freely from a height, the net force is not equal to zero.

Test: Force & Pressure- 3 - Question 13

We use a straw (narrow pipe) to drink juice from a glass. What make this possible?

Detailed Solution for Test: Force & Pressure- 3 - Question 13

When we suck air from pipe, atmospheric pressure pushes the liquid juice up to fill the vacuum and it comes up.

Test: Force & Pressure- 3 - Question 14

Which of the following effects is NOT caused by the magnetic force between a magnet and a magnetic substance?

Detailed Solution for Test: Force & Pressure- 3 - Question 14

A magnet attracts a magnetic material thereby making it move from rest. There may be a temporary change in the shape or size. But there is no change in the chemical composition.

Test: Force & Pressure- 3 - Question 15

In cities, water from an overhead tank is supplied to houses using the principle of
(i) difference in pressure.
(ii) gravitational force.
(iii) decrease of friction m pipes.

Detailed Solution for Test: Force & Pressure- 3 - Question 15

The water at a height flows down due to pressure and gravitational force.

Test: Force & Pressure- 3 - Question 16

A deep sea diver's ears get hurt when he is inside the water. What is the cause for it?

Detailed Solution for Test: Force & Pressure- 3 - Question 16

Water pressure increases with an increase in the depth of the sea which effects the diver's ears.

Test: Force & Pressure- 3 - Question 17

What does a barometer measure?

Detailed Solution for Test: Force & Pressure- 3 - Question 17

The barometer is used to measure atmospheric pressure of a place.

Test: Force & Pressure- 3 - Question 18

Four forces are acting on a body. If the body does not change its position or shape/then what does it mean?

Detailed Solution for Test: Force & Pressure- 3 - Question 18

For a body to be in equilibrium or at rest, the vector sum of all forces must be zero.

Test: Force & Pressure- 3 - Question 19

Why do deep sea divers use a special suit for diving?

Detailed Solution for Test: Force & Pressure- 3 - Question 19

The suit (known as scuba suit) is pressurized to counter balance the heavy pressure in deep sea.

Test: Force & Pressure- 3 - Question 20

On what factors does the magnitude of non-contact force depend?

Detailed Solution for Test: Force & Pressure- 3 - Question 20

The magnitude of non-contact force depends on the distance between two bodies, mass and chemical composition of the two bodies.

## General Science(Prelims) by IRS Divey Sethi

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## General Science(Prelims) by IRS Divey Sethi

39 videos|110 docs|255 tests