Rest and Motion

Q.

A body is said to be at rest if it does not change its position with respect to the reference point.

1. True

2. False

Q.

Which of the following statement(s) about motion is/are true?

1. Motion of an object is only relative to the position of another object.

2. Change in motion is the result of an applied force.

3. Motion is change of location or position of an object with respect to time.

4. All of these

Q. If you have to move your head while looking at an object, it is in motion.

1. True
2. False

Q. When an object doesn't change its position with respect to its surroundings and time, it is said to be at rest.

1. True
2. False

Q. Which of the following situation(s) can be considered to be at rest for an observer travelling in a moving car?

1. Birds flying at the same speed in the same direction as that of the moving car.
2. Children crossing the road in front of the moving car.
3. Trees planted on the sides of the road.
4. A cat sleeping in the same car.

Q. Which of the following situation(s) can be considered to be at rest for an observer travelling in a moving car?

1. Birds flying at the same speed in the same direction as that of the moving car.
2. Children crossing the road in front of the moving car.
3. Trees planted on the sides of the road.
4. A cat sleeping in the same car.

Q. Which of the following is the common characteristic of all the moving bodies?

1. They change their position with time.
2. They always travel with uniform speed.
3. They always travel with varying speed.
4. They do not change their position with time.

Q.

If three trains are moving at the same speed,

then which of the following is correct?

1. Train $A$ and train $B$ are at rest with respect to each other, but are in motion with respect to train $C$.
2. Train $A$ and train $C$ are at rest with respect to each other, but are in motion with respect to train $B$.
3. Trains $A$, $B$ and $C$ are at rest with respect to each other.
4. Train $B$ and train $C$ are at rest with respect to each other, but are in motion with respect to train $A$.

Q. When an object doesn't change its position with respect to its surroundings and time, it is said to be at rest.

1. True
2. False

Q. Match the following terms:

1. Vector quantity
2. Reference frame
3. Actual length