Class 9 Physics Quiz – Force & Laws of Motion (Free Online Test)

1. Newton’s second law states force is equal to:

2. An object in uniform motion has what acceleration?

3. SI unit of force is:

4. Which law explains the recoil of a gun?

5. Car goes from 0 to 60 m/s in 10 sec. Acceleration?

6. If mass is doubled, inertia becomes:

7. Distance-time graph of a body at rest is:

8. Which quantity is conserved in all collisions?

9. Formula for kinetic energy is:

10. Body in circular motion at constant speed has:

1. A force is required to:

2. Newton’s first law of motion is also known as:

3. The SI unit of force is:

4. Inertia of a body depends upon its:

5. A passenger in a moving bus falls forward when the bus suddenly stops. This is due to:

6. According to Newton’s second law, force is directly proportional to:

7. A bullet of mass 20 g is fired with a velocity of 100 m/s. The momentum of the bullet is:

8. Newton’s third law states that:

9. While walking, a person pushes the ground backward and moves forward due to:

10. The law of conservation of momentum states that the total momentum of a system:

1. Which of the following is a contact force?

2. A cricket player lowers his hands while catching a ball to:

3. Two objects of masses 5 kg and 10 kg move with velocities 2 m/s and 1 m/s respectively. The object with greater momentum is:

4. A rocket moves forward by pushing gases backward. This is an example of:

5. The mass of an object is 10 kg. What force is needed to give it an acceleration of 5 m/s²?

6. A karate player can break a slab of ice with a single blow because:

7. Which quantity remains unchanged in an elastic collision between two bodies?

8. A horse pulling a cart cannot move it if it applies force only on the cart because:

9. Which of the following has the highest inertia?

10. The gun recoils after firing a bullet because of:

1. The property of a body by virtue of which it resists any change in its state of rest or motion is called:

2. A block of mass 2 kg moving with a velocity of 3 m/s is brought to rest in 2 seconds. The force applied is:

3. When we beat a carpet with a stick, dust particles come out because of:

4. Which of the following statements is correct regarding balanced forces?

5. A body of mass 4 kg is acted upon by two equal and opposite forces of 10 N each. The acceleration produced is:

6. Momentum of a body is defined as the product of its:

7. A player pulls his hands back while catching a fast-moving cricket ball to avoid injury. This illustrates:

8. Two blocks of masses 6 kg and 4 kg are moving with the same momentum. The ratio of their velocities is:

9. Which of the following is an example of Newton’s first law of motion?

10. The force required to stop a moving object depends on:

1. A body of mass 5 kg is moving with a uniform velocity of 10 m/s. The force required to keep it moving with the same velocity is:

2. Which scientist first stated the laws that explain the relationship between force and motion?

3. If action and reaction forces always act on different bodies and are equal and opposite, why don’t they cancel out?

4. A car of mass 1000 kg accelerates from rest to 20 m/s in 10 seconds. The force applied is:

5. When a moving bus suddenly starts, the passengers standing in it tend to fall backward due to:

6. In a game of tug-of-war, a team wins when it:

7. The product of mass and acceleration of a body gives its:

8. A truck and a car moving with the same velocity collide with a wall. Which one experiences a greater force to stop it in the same time?

9. Seat belts in cars are designed to:

10. Two identical balls of mass 1 kg each move towards each other with velocities 3 m/s and 3 m/s and collide, coming to rest after collision. This demonstrates: