Question

2. Answer the following questions in brief.
1.In the following situations, identify the agent exerting the force. Also, state
the effect of the force in each case.
(a) Squeezing a piece of lemon between the fingers to extract its juice.
(b) A person diving into a swimming pool.
(c) A labourer moving a loaded cart.
(d) A car coming to rest once its engine is switched off.
(e) An athelete making a high jump to clear a bar kept at a certain height.​

Answer 1

Explanation:

a) Squeezing a piece of lemon between the fingers to extract its juice:

external agent --- Muscular force by fingers

Here the effect of muscular force is that its changing the shape and size of object and lemon juice being expelled by squeezing

b)A person diving into a swimming pool:

Agent used --- again Muscular force used by person

Here the effect of force is

--> state of rest is changed to motion--cart is brought into motion

c) A labourer moving a loaded cart.

agent used--- Muscular force

effect of force :

---> State of object is changed

---> direction of motion is changed.

d) A car coming to rest once its engine is switched off.

Agent used --- Muscular force of person to off engine

effect of force: Object in motion is brought to rest.

e)An athlete making a high jump to clear a bar kept at a certain height.:

agent used : muscular force of athlete

Effect of force:change in state of motion of Athlete