ICS Part 1 Physics English Medium Chapter 5 Online Short Questions Test with Answers

Question # 1

Why Einstein views of gravitation are preferred than Newton's views of gravitation? Explain briefly

Ans 1: Newton discovered the inverse square law of gravity. Einstein's theory also says that gravity follows an inverse square law (except in strong gravitational fields), but it gives us a physical picture of how gravity works. The bending of star light caused by the gravity of the Sun was measured during a solar eclipse in 1919, it was found to match Einstein's Prediction rather than Newton's.

Question # 2

Define Moment of Inertia.Write its formula.

Ans 1: The property of the body to resist any change in its state of rest or uniform angular velocity is called moment of inertia. For a point mass 'm'situated at a distance 'r' from the axis of rotation , the moment of inertia 'I' is given by ; I=mr²
Significance;
Moment of inertia plays the same role in angular motion as that of mass plays in linear motion. It is also called measure of rotational inertia in angular motion.Moment of inertia determines the angular acceleration while mass determines the linear acceleration.

Question # 3

Explain conservation of direction of angular momentum.

Ans 1: The direction of angular momentum along the axis of rotation remains fixed. This is due to the fact that the axis of rotation of an object will not change its orientation unless an external torque causes it to do so .

Question # 4

How is artificial gravity created?

Ans 1: Artificial gravity is the gravity like effect produced in an orbiting spaceship to overcome weightlessness.To create artificial gravity the spaceship is set into rotation around its own axis. The astronaut then is presses towards the outer rim and exerts a force on the floor of the spaceship in much the same way as on the earth.

Question # 5

Why the microwaves are used in satellite communication?

Ans 1: Micro waves are used in satellite communication because they travel in a narrow beam, in a straight line and pass easily through the atmosphere of the earth.

Question # 6

Define centripetal force; write its formula and unit.

Ans 1:

Question # 7

What is meant by centripetal force?Write down its formula

Ans 1:

Question # 8

An object orbiting around the earth in said to be a freely falling body. Why?

Ans 1: An object in orbits is said to be freely falling , because the trajectory of its fall has the same curvature as Earth's surface. In fact, the object is falling towards the center of earth but because of spherical shape of earth, it never reaches the surface of earth.

Question # 9

Why you wear seat belts?

Ans 1: During collision, the passengers move forward towards the windscreen due to inertia. The seat belt prevents the passenger from moving forward. And lessened the chances of injury.

Question # 10

Why is the axis of rotation of Earth remains fixed in one direction with respect to the universe around it?

Ans 1: The major force acting on Earth is the pull of the Sun and no other sizeable toque is experienced by it. The Earth's axis of rotation, therefore remains fixed in one direction with reference to the universe around us.

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ICS Part 1 Physics English Medium Chapter 5 Online Short Questions Test with Answers

Online Short Questions For Chapter 5 "ICS Part 1 Physics Chapter 5 Short Questions Test "

Physics - ICS Part 1 Physics Chapter 5 Short Questions Test

Why Einstein views of gravitation are preferred than Newton's views of gravitation? Explain briefly

Define Moment of Inertia.Write its formula.

Explain conservation of direction of angular momentum.

How is artificial gravity created?

Why the microwaves are used in satellite communication?

Define centripetal force; write its formula and unit.

What is meant by centripetal force?Write down its formula

An object orbiting around the earth in said to be a freely falling body. Why?

Why you wear seat belts?

Why is the axis of rotation of Earth remains fixed in one direction with respect to the universe around it?

Prepare Complete Set Wise Questions For Chapter 5 "ICS Part 1 Physics Chapter 5 Short Questions Test "

Set 1

Set 2

Set 3

ICS Part 1 Physics Chapter 5 Short Questions Test - Set 1

Why Einstein views of gravitation are preferred than Newton's views of gravitation? Explain briefly

Define Moment of Inertia.Write its formula.

Explain conservation of direction of angular momentum.

How is artificial gravity created?

Why the microwaves are used in satellite communication?

Define centripetal force; write its formula and unit.

What is meant by centripetal force?Write down its formula

An object orbiting around the earth in said to be a freely falling body. Why?

Why you wear seat belts?

Why is the axis of rotation of Earth remains fixed in one direction with respect to the universe around it?

ICS Part 1 Physics Chapter 5 Short Questions Test - Set 2

How is artificial gravity created?

Explain the difference between tangential velocity and angular velocity.

An object orbiting around the earth in said to be a freely falling body. Why?

What is meant by centripetal force? Write down its formula.

Define centripetal force; write its formula and unit.

Define angular momentum and give its dimension.

Define angular velocity give its units and dimensions.

Define Moment of Inertia.Write its formula.

On what factors moment of inertia depends?

What is meant by moment of inertia? Explain its significance.

ICS Part 1 Physics Chapter 5 Short Questions Test - Set 3

Define angular displacement.

What is meant by centripetal force?Write down its formula

What are geostationary orbit and geostationary satellites?

Define angular velocity, How its direction is determined?

What is mean by angular momentum?

Why you wear seat belts?

Explain the difference between tangential velocity and angular velocity.

Define angular displacement and write its S.I unit.

Why is the axis of rotation of Earth remains fixed in one direction with respect to the universe around it?

Define angular velocity give its units and dimensions.

ICS Part 1 Physics Short Questions Test

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