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

Question # 1

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

Ans 1: The product of mass of the particle and square of its perpendicular distance from the axis of rotation is called the moment of inertia.

I =mr²
^{The moment of inertia plays the same role in angular motion as the mass in linear motion.}

Question # 2

What is meant by centripetal force?Write down its formula

Ans 1:

Question # 3

State the right hand rule to find the direction of angular displacement.

Ans 1: It states that
"Grasp the axis of rotation in right hand with the fingers curling in the direction of rotation , then the erect thumb will give the direction of angular velocity and angular momentum"

Question # 4

Why banked tracks are needed for turns?

Ans 1: Banked tracks are needed because friction alone cannot provide energy for centripetal force.
If the road is banked, so that the outer edge is above the inner edge, then a portion of the normal force from the road on the tyre points towards the center of the track; this fraction of the normal force can provide enough centripetal force to keep the car moving in a circle.

Question # 5

Write down application of communication satellites.

Ans 1: A satellite communication system consist of three geo-stationary satellites.There are over 200 Earth stations which can transmit and receive signals.INTELSAT-VI operates at microwave frequencies 4, 4, 11 and 14 Ghz and has a capacity of 30,000 two way telephone circuits plus three TV channels.
Geo-stationary satellite are very useful for worldwide communication,weather observation, navigation, and other military uses.

Question # 6

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 # 7

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 # 8

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 # 9

State the direction of the following vectors in simple situation:
A) Angular Momentum B) Angular Velocity

Ans 1: The direction of angular momentum and angular velocity can be determined by right hand rule;
"Grasp the axis of rotation in right hand with the figures curling in the direction of rotation, then the erect thumb will give the direction of angular velocity and angular momentum."

Question # 10

What are Artificial Satellites and how they move around the earth?

Ans 1: Satellites are the objects that orbit around the earth.They are put into orbit by rockets and are held in orbits by the gravitational pull of the earth.

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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

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

What is meant by centripetal force?Write down its formula

State the right hand rule to find the direction of angular displacement.

Why banked tracks are needed for turns?

Write down application of communication satellites.

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

Why you wear seat belts?

Define Moment of Inertia.Write its formula.

State the direction of the following vectors in simple situation:A) Angular Momentum B) Angular Velocity

What are Artificial Satellites and how they move around the earth?

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

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

What is meant by centripetal force?Write down its formula

State the right hand rule to find the direction of angular displacement.

Why banked tracks are needed for turns?

Write down application of communication satellites.

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

Why you wear seat belts?

Define Moment of Inertia.Write its formula.

State the direction of the following vectors in simple situation:A) Angular Momentum B) Angular Velocity

What are Artificial Satellites and how they move around the earth?

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

Define angular velocity, How its direction is determined?

What are Artificial Satellites and how they move around the earth?

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

What is mean by angular momentum?

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

When mud files off the tyre of a moving bicycle, I what direction does it fly?

Define angular momentum and give its dimension.

Why you wear seat belts?

Explain how many minimum number of Geo-stationary satellites are required for global coverage of T.V transmission.

Define Moment of Inertia.Write its formula.

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

What is meant by centripetal force?Write down its formula

Write down application of communication satellites.

On what factors moment of inertia depends?

Explain how many minimum number of Geo-stationary satellites are required for global coverage of T.V transmission.

What is meant by INTEL SAT? At what frequencies the INELSAT-VI operates ?

Explain why earth's satellite despite of being freely falling object does not reach the earth.

What is mean by angular momentum?

State the direction of the following vectors in simple situation:A) Angular Momentum B) Angular Velocity

Define Moment of Inertia.Write its formula.

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

ICS Part 1 Physics Short Questions Test

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State the direction of the following vectors in simple situation:
A) Angular Momentum B) Angular Velocity

State the direction of the following vectors in simple situation:
A) Angular Momentum B) Angular Velocity

State the direction of the following vectors in simple situation:
A) Angular Momentum B) Angular Velocity