Mass and Inertia

Q.

Differentiate between mass and inertia.

Q. Explain the following:
​​​​​​(I) Inertia of rest
(ii) Inertia of motion
(iii) Inertia of direction

Q.

Which one has more inertia a cricket ball or a rubber ball of same size give reason

Q. If an elephant was chasing you, its enormous mass would be most threatening. But if you moved in a zigzag path, its big mass would become your advantage. Why?

Q.

The measure of inertia of an object is:

1. Its force

2. Its acceleration

3. Its mass

4. Its velocity

Q.

what is inertia , name the two factors on which it depends

Q.

The magnitude of inertia of a body is determined by its:

__

Q. The quantitative measure of inertia is _________.

1. acceleration of body.

2. force produced by body.

3. mass of body.

4. velocity of body.

Q.

An iron ball and aluminum ball has same mass

1. inertia of iron is greater than aluminum

2. both balls have same inertia

3. inertia of iron is less than that of aluminum

4. none of these

Q. Which of the following has the lowest inertia?

1. A truck of mass 10, 000 kg
2. A car of mass 2, 000 kg
3. A bike of mass 20 kg
4. A man of mass 40 kg

Q.

a body at rest opposes the forces which try to move it. name the property called and give an eg.

Q. More the mass, more will be the inertia of the body.

1. True
2. False

Q. What is inertia?

Q.

The property of bodies to resist a change in their state of rest or of motion is known as:

1. Velocity

2. Acceleration

3. Inertia

4. Force

Q.

Does moment of inertia of a rigid body change with the speed of rotation? Explain.

Q.

If a bus starts moving suddenly, the passengers inside the bus will tend to bend

1. Opposite to the direction of motion

2. Sideways

3. Neither

4. In the direction of motion

Q. Do all bodies have the same inertia? Explain it with an example.

Q. Determine moment of inertia in case of a ring about an axis touching its outer edge lying in its plane

Q. When an athlete takes part in a long jump he runs for a while and then jumps. This is because:

1. inertia of motion helps him to take a longer jump.
2. running for a time makes him alert.
3. it helps him to focus on the point of jump.
4. he can apply more force for the jump after running.

Q.

There is a steel block and plastic block both of the same size. If both blocks are at rest, it means that

1. plastic ball has more inertia than steel ball

2. None of the above

3. steel ball has more inertia than plastic ball

4. Both have the same inertia

Q. In definition of moment of inertia, a point is taken in which the whole mass of the body is accumulated but it is not taken to be the centre of mass of the body. Why?

Q.

The measure of inertia of an object is

1. Its force

2. Its acceleration

3. Its velocity

4. Its mass

Q.

Study the following scenarios and identify what type of inertia tends to resist the change.

1. When the bus suddenly starts, the passenger on the bus tends to fall backwards.

2. When a passenger jumps out of a moving bus, he/she falls down.

3. A cyclist riding on a level road does not come to rest immediately even he/she stops pedalling.

1. Only 1 is due to the inertia of rest and is due to the inertia of motion.

2. Only 1 is due to the inertia of rest and others are due to the inertia of motion.

3. Only 1 is due to the inertia of motion and others are due to the inertia of rest.

4. All are due to the inertia of rest.

Q. why does horse rider falls forward when horse stops suddenly?

Q. 1.When a carpet is beaten wirh stick, dust comes out of it?

Q.

On what factors does inertia depend?

Q.

What do you mean by inertia ?

Q. Moment of inertia of rod about an axis perpendicular to its and passing through its centre is equal to ML^2/2 . Find moment of inertia of rod about an axis perpendicular to its passing through its 1 end.

Q. The inertia of an object depends on the of the object.

1. speed
2. shape
3. volume
4. mass

Q. the moment of inertia of a disc about an axis perpendicular to the plane of the disc passing through its com is Io. it is folded along a diameter so that is one half becomes perpendicular to another half. calculate its moment of inertia about its diameter