In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.
(a) Squeezing a piece of lemon between the fingers to extract its juice.
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Squeezing a piece of lemon between the fingers to extract its juice.
When we squeeze a lemon, force is applied by our fingers on the lemon.
This results in the change in the shape of the lemon
(b) Taking out paste from a toothpaste tube.
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Taking out paste from a toothpaste tube.
When we press the toothpaste, our fingers are used to exert force on the toothpaste tube
This results in the change in shape of the toothpaste tube
(c) A load suspended from a spring while its other end is on a hook fixed to a wall.
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A load suspended from a spring while its other end is on a hook fixed to a wall
When a load is suspended from the spring, load pushes the spring down making the spring stretched.
This results in a change in the shape of the spring
(d) An athlete making a high jump to clear the bar at a certain height.
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An athlete making a high jump to clear the bar at a certain height.
When athlete jumps, he pushes the ground while jumping.
His feet exerts force on the ground which helps him to jump over the bar
This results in a change in his motion
|
Agent exerting the force |
Object on which force acts |
Effect of force |
|
|
(a) |
Fingers |
Lemon |
Change in shape of the lemon |
|
(b) |
Fingers |
Toothpaste |
Change in shape of toothpaste tube |
|
(c) |
Load |
Spring |
Change in shape of the spring |
|
(d) |
Muscles of Athlete |
Ground |
Change in state of the motion of the athlete |