﻿ A car of mass 1000 kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45o, the speed of the car is  from Physics Laws of Motion Class 11 Manipur Board

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A car of mass 1000 kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45o, the speed of the car is

• 20 ms-1

• 30ms-1

• 5 ms-1

• 10 ms-1

B.

30ms-1

The angle of banking

The angle of banking

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State Galileo’s law of motion.

Galileo’s law of motion states that, a body continues to move in the same direction with constant speed, if no force is acting on the body.
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Is Aristotle’s law of motion now correct?

No. Aristotl'e law of motion is false.
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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.

So, the apples fall down.
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What is Aristotle’s law of motion?

Aristotle’s law of motion states that an external force is required to keep the body in motion.
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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.
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