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Effects of Force
- A force cannot be seen directly
- It is judged by its effects
- It can move a stationary object
- It can stop or speed up an object
- It can change direction or shape
Example 1 — Kicking a football
- a stationary ball is at rest
- the kick applies a force
- the ball starts moving
Example 2 — Pressing dough
- a rolling pin presses dough
- its shape changes
- force changes the shape
Important Points
- A force can move a stationary object and stop a moving one.
- A force can change the speed and the direction of a moving object.
- A force can change the shape and size of an object.
Definition — Effects of Force
The effects of force means the changes a force can produce — moving, stopping, changing the speed, direction, shape or size of an object.
Subjective Type Questions - Short Answer Q2(a) - Page 94 Lakhmir Singh
Question
What is force? State the various effects of force.
Show answer
Force is a push or pull; it can move, stop, speed up, slow down, change the direction, or change the shape of an object.
Explanation
- A force can move a stationary object.
- A force can stop a moving object.
- A force can change the speed of a moving object.
- A force can change the direction of a moving object.
- A force can change the shape and size of an object.
Objective Type Questions Q3(a) - Page 93 Lakhmir Singh
Question
State whether true or false: A force is always required to change the speed of motion of an object. (NCERT Book Question)
Show answer
True
Explanation
- A force can change the speed of a moving object, increasing or decreasing it.
