Force and Motion Quiz - CBSE Class 9 Science

Free practice quiz: Force and Motion (CBSE Class 9 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 9 Science practice quiz has 20 multiple-choice questions on Force and Motion, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is force in scientific terms?

   1. A push or pull
   2. A movement
   3. An energy
   4. A static position
   Show answer

   Answer: A. A push or pull

   Force is defined as a push or pull acting upon an object as a result of its interaction with another object.

2. What is the formula for calculating force?

   1. Force = Mass x Acceleration
   2. Force = Mass / Acceleration
   3. Force = Acceleration / Mass
   4. Force = Mass + Acceleration
   Show answer

   Answer: A. Force = Mass x Acceleration

   According to Newton's Second Law, force equals mass times acceleration (F = ma).

3. If two forces of magnitude 5 N and 10 N act in opposite directions on an object, what is the net force?

   1. 15 N
   2. 5 N
   3. 10 N
   4. 0 N
   Show answer

   Answer: B. 5 N

   The net force is calculated by subtracting the smaller force from the larger force (10 N - 5 N = 5 N) since they are in opposite directions.

4. If you double the mass of an object with constant force, what happens to the acceleration?

   1. Quadruples
   2. Halves
   3. Doubles
   4. Remains unchanged
   Show answer

   Answer: B. Halves

   According to F = ma, if mass is doubled and force remains constant, acceleration must halve to balance the equation.

5. If an object's velocity and force are in opposite directions, what happens to the object's speed?

   1. It increases
   2. It decreases
   3. It remains constant
   4. It is unpredictable
   Show answer

   Answer: B. It decreases

   When the force is opposite to the direction of velocity, it results in deceleration, hence decreasing the object's speed.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the unit of force?
2. Which of the following affects the motion of a body?
3. What acts in the direction opposite to the motion of an object?
4. An object is moving with constant velocity. What can we conclude?
5. A force of 10 N is applied to a mass of 5 kg. What is its acceleration?
6. Which of these is NOT a contact force?
7. Which law explains the relationship between force, mass, and acceleration?
8. Which component of force affects the horizontal motion of an object?
9. A book is resting on a table. What force is necessary to hold it stationary?
10. How many types of fundamental forces are there?
11. What is the result of unbalanced forces acting on an object?
12. An object accelerates from rest under a force of 15 N. What additional information is needed to find acceleration?
13. What is necessary for motion to occur according to Newton's first law?
14. If a car moves with a constant speed of 60 km/h due north, what is affecting its motion?
15. How do paired forces act in Newton's Third Law?

Browse all Force and Laws of Motion quizzes

More to play