Question

what is force? Explain the four effects a force can produce, giving relevant examples.

Answer 1

hello
here is u r answer

a pull or a push is called force

1) it can make a stationry object move
kick a football

2) it can change the position of rest
pick up a glass of water

3) it can change the motion of object
batsmen hitting a ball

4) it can change the shape /size of the object
squeez a sponge



hope it helps

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Answer 2

Force--

Very famous definition push or pull is known as force.
Actually Force is an interaction that causes a change in an object's motion. An object may speed up, slow down, or change direction in response to a force. Objects are pushed or pulled by forces acting on them can be said as force.

Effects of force---

1.Change in speed--

Change in speed means force can increase or decrease speed of any object. Even if the speed of object is zero it is to be considered in state of motion.

Example of increase in speed--
When player kicks the ball the changes its speed from zero to a non-zero value thus changing the state of motion of the ball. It may also when ball runs by kicking speed may be also increase.

Example of decrease in speed--

When ball its speed comes down from a non-zero value to a zero value, which finally results in change of state of motion of the ball.

Change in shape of an object

As force can also change shape of objects by straching or by elongating etc.

Example 1:

When a force is applied to a fixed spring in the direction of arrow then the spring gets extended thus changing its shape.

Also if it is applied oppositely then it gets compressed.

Example2:
 A very common observation that when we try to pull rubber band, it gets elongated.

I hope helps you