MCQ Force Chapter 9 Class 9 Science

MCQ’s For All Chapters – Science Class 9th

1. There will be total 14 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A force is defined as a:

Fall

Pull

Push or Pull

Push

Your comments:

Question 1 of 14

2. One way that you can recognize that a force is acting on an object:

is to note any change in the objects state of motion.

is to determine its mass at different locations.

is to measure the instantaneous velocity of a moving object.

A and C

Your comments:

Question 2 of 14

3. A 1-kg object is lying on the ground. An unbalanced force of magnitude 1 N is applied to the object. Which of these options explains the motion of the object as a result of the acting force?

The object will accelerate in the direction of the applied force.

The object will accelerate in a direction perpendicular to the applied force.

The object will decelerate in the direction of the applied force.

The object will remain at rest.

Your comments:

Question 3 of 14

4. If an object experiences a net zero unbalanced force, then the body:

Cannot remain at rest.

Can be accelerated.

Moves with a constant velocity.

Will always remain at rest.

Your comments:

Question 4 of 14

5. Identify from the following, the case where balanced force acts on it.

A person resting on an armchair.

A lorry travelling at a variable speed on a straight road.

A cyclist braking.

A car that has a deceleration of 10 m/s²

Your comments:

Question 5 of 14

6. A force of 10 N acts on a ball moving on a surface. The force of friction that must act between the surface of the ball and the surface so that the ball keeps on moving with constant velocity over the surface must be:

Zero

20N

10N

100N

Your comments:

Question 6 of 14

7. ___________ is a force, which always opposes the motion of one body over the other body in contact with it

Gravitational force

Reaction force

Normal force

Frictional force

Your comments:

Question 7 of 14

8. If an object moves with a uniform velocity we can conclude that

there is no force acting on the body

no unbalanced force acts on it

an unbalanced force acts on the body

it has uniform acceleration

Your comments:

Question 8 of 14

9. When a force is exerted on an object, it can change its:

State

Position

Shape

All the above

Your comments:

Question 9 of 14

10. SI unit of force is kg m s^-2. This unit is also known as:

Kilowatt

Joule

Watt

Newton

Your comments:

Question 10 of 14

11. Assertion-The unbalanced force acting on an object which brings it in motion.

Reason-force is nothing but the energy present inside the body.

a) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c) Assertion is true but Reason is false.

d) Both Assertion and Reason are false.

Question 11 of 14

12. Assertion-The unbalanced force acting on an object which brings it in motion.

Reason-force is nothing but the power present inside the body.

a) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c) Assertion is true but Reason is false.

d) Both Assertion and Reason are false.

Question 12 of 14

13. Assertion : If the net external force on the body is zero, then its acceleration is zero.
Reason : Acceleration does not depend on force.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 13 of 14

14. Assertion : A rocket works on the principle of conservation of linear momentum.
Reason : For two bodies system when there is a change in momentum of one body, the same change occurs in the momentum of the second body but in the opposite direction.

a.) Both Assertion and Reason are correct, and reason is the correct explanation for assertion.

b.) Both Assertion and Reason are correct, and Reason is not the correct explanation for Assertion.

c.) Assertion is true but Reason is false.

d.) Assertion is false but Reason is true.

Question 14 of 14

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