ï»¿ The upper half of an inclined plane of the inclinationÂ Â is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by, from Physics Laws of Motion Class 11 Manipur Board

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The upper half of an inclined plane of the inclinationÂ Â is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by,

C.

The block will be stationary when,

mg sinÂ Â . L =Â Â mg cosÂ

The block will be stationary when,

mg sinÂ Â . L =Â Â mg cosÂ
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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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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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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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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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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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