ï»¿ Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work doneÂ on the particle during its displacement of 12 m is from Physics Laws of Motion Class 11 Manipur Board

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Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work doneÂ on the particle during its displacement of 12 m is

• 21 J

• 26 JÂ

• 13 J

• 18 J

C.

13 J

Work done = Area under (F - x) graph

= 2 x (7-3) +Â

Work done = Area under (F - x) graph

= 2 x (7-3) +Â

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Define inertia.

The property by virtue of which the body cannot change its state of rest or uniform motion in a straight line, unless an external force is acting on the body is called as Inertia.Â
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When the branches of an apple tree are shaken, the apples fall down. Why?

The apple fall from an apple tree when it shaken because of inertia of rest. Apple is in a state of rest and when the tree is suddenly shaken, apples still tends to remain in it's same state of rest whereas branches move.Â

So, the apples fall down.Â
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Is Aristotleâ€™s law of motion now correct?

No. Aristotl'e law of motion is false.Â
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State Galileoâ€™s law of motion.

Galileoâ€™s law of motion states that, a bodyÂ continues to move in the same direction with constant speed, if no force is acting on the body.Â
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What is Aristotleâ€™s law of motion?

Aristotleâ€™s law of motion states that an external force is required to keep the body in motion.
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