Force

Q.

How do we use kinetic energy in everyday life?

Q.

A body is said to be in equilibrium if

1. all forces act on it in the same direction

2. it moves at a constant speed along a curved path

3. it moves with a varying speed along a straight path

4. no net force acts on it

Q.

How force is a vector quantity?

Q.

A combination of all the forces acting on an object is called

1. Balanced force

2. Net force

3. Gross force

4. Unbalanced force

Q.

What can a force do to an object?

1. Make it speed up - accelerate.

2. Make it slow down - decelerate.

3. Change its direction.

4. Change its shape.

Q.

A jet engine works on the principle of newtons.

1. First law of motion

2. Second law of motion

3. Third law of motion

4. None of these

Q.

What change(s) will you definitely observe when a force is applied to an object?

1. Change the shape of an object

2. Move an object forward

3. Stop a moving object

4. None of the these

Q. Why do we say that force is a vector quantity? Give one more example of vector quantity

Q.

In order to take out the paste from a toothpaste tube, we need to squeeze it. Which of the below-mentioned agent is required to serve this purpose?

1. None of the above

2. Speed

3. Heat energy

4. Force

Q. A force is required to stop a moving object.

1. True
2. False

Q. What is the push or pull applied on an object which causes it to change its direction, speed or shape called?

1. Mass
2. Pressure
3. Gravity
4. Force

Q.

What changes can a force bring in an object, when applied to it. Will a force always brings a change in the state of motion of an object? [5 MARKS]

Q.

What is a force? State its various types.

Q. Which of the following statements is true for force?

1. Force can change the shape of an object.
2. Force can change the direction of an object.
3. Force can change the speed of an object.
4. All of these

Q.

Define motion

Q. Forces applied to a body brings a change in its state of motion if __________.

1. they are unbalanced
2. the body is in rest only
3. they are balanced
4. they eliminate the cause

Q.

Which of the following does not cause any change in the state of motion of an object?

1. Unbalanced force

2. Net force

3. None of them

4. Balanced force

Q.

Is kicking a ball push or pull?

Q.

What is motion when do we say an object is moving

Q.

In a tug of war, when one team is pulling with a force of 100 N and the other 80 N, what is the net force?

1. 10 N

2. 20 N

3. 1800 N

4. 180 N

Q.

Explain force and motion with examples.

Q. Which of the following are fundamental forces?

1. Gravitational force
2. Electromagnetic force
3. Mechanical force
4. Frictional force

Q.

The velocity of an object can be changed by altering

Q. A rubber band is pulled and its shape is changed. When the pull is withdrawn, it comes back to its original shape because the force was not actually applied.

1. True
2. False

Q.

Which of the following cannot be done on the application of force on an object?

1. Change in speed

2. Change in shape

3. Change in direction

4. Change in colour

Q. What happens when the net force applied on an object is opposite to the direction of its motion?

1. The speed of the object decreases.

2. The speed of the object increases.

3. The speed of the object first increases and then decreases.

4. The speed of the object doesn't change.

Q. What are the things that can be done by applying force?

Q.

Which of the following is an example of potential energy?

1. .A vibrating pendulum at its maximum displacement from its mean position

2. A body at rest from some height from the ground.

3. A wound clock spring.

4. A vibrating pendulum when it is just passing through its mean position

Q. A leaf falls down due toforce.

1. electrostatic
2. magnetic
3. gravitational

Q. An object may be moving in the direction opposite to the force when it is being applied.

1. True
2. False