NCERT 8th Class (CBSE) Science: Force and Pressure

Question: Define force.

Answer: Any push or pull is called force.

Question: When does a body move?

Answer: A body moves when force is applied.

Question: What is the first requirement to put force into play?

Answer: Interaction between two objects.

Question: Give any example of push.

Answer: Pushing a table to wall.

Question: Give an example of pull.

Answer: Pulling the door to shut.

Question: When force is applied on the object in the same direction of motion what happens?

Answer: The speed will increase.

Question: What will be happen when force is applied in the direaction opposite to the movement of object?

Answer: The speed will decrease.

Question: How is the strength of a force of motion?

Answer: In magnitude.

Question: What effect does force expressed?

Answer: The speed of the object may change.

Question: What is the state of motion of an object?

Answer: The speed and direction of an object is called state of motion.

Question: Does the force change the direction of the moving object?

Answer: Yes.

Question: Does the force change the shape of the object?

Answer: Yes.