Force and Motion Quiz - CBSE Class 4 Science

Free practice quiz: Force and Motion (CBSE Class 4 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. What is a force?

   1. A push or pull on an object
   2. An object that moves
   3. The path of an object
   4. The speed of an object
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   Answer: A. A push or pull on an object

   A force is defined as a push or pull acting upon an object. It can cause the object to move, stop, or change direction.

2. How does friction affect motion?

   1. Increases speed
   2. Decreases speed
   3. Has no effect
   4. Changes direction
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   Answer: B. Decreases speed

   Friction is a force that opposes the motion of objects, so it generally decreases speed and can bring an object to a stop.

3. What unit is used to measure force?

   1. Kilograms
   2. Newtons
   3. Meters
   4. Liters
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   Answer: B. Newtons

   The SI unit of force is the Newton (N), which quantifies the amount of force required to accelerate a one-kilogram mass by one meter per second squared.

4. What can be said about an object moving at constant speed in a straight line?

   1. There are balanced forces acting on it
   2. There is no force acting on it
   3. It is speeding up
   4. It is slowing down
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   Answer: A. There are balanced forces acting on it

   An object moving at constant speed in a straight line experiences balanced forces, which means no net force is acting to change its speed or direction.

5. If you wanted to push a heavy box across the floor with less effort, what could you do?

   1. Push it as hard as you can
   2. Use a lever
   3. Stop using friction
   4. Make the box heavier
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   Answer: B. Use a lever

   Using a lever reduces the amount of force required to move an object by amplifying the input force, making it easier to push heavy objects like boxes.

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