Question

9. (a) Differentiate between uniform linear and uniform circular motion.

b: Write any two examples of uniform circular motion.

c: Is uniform circular motion accelerated motion?​

Answer 1

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(a) In uniform linear motion, the speed and direction of motion is fixed and so, it is not accelerated.

In uniform circular motion, the speed is constant but the direction of motion changes continuously and hence, it is accelerated. Example- Motion of earth around the sun.

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(b) Following are the examples of uniform circular motion:

• Motion of artificial satellites around the earth is an example of uniform circular motion. ...
• The motion of electrons around its nucleus.
• The motion of blades of the windmills.
• The tip of second's hand of a watch with circular dial shows uniform circular motion.

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(c) An object undergoing uniform circular motion is moving with a constant speed. Nonetheless, it is accelerating due to its change in direction. The direction of the acceleration is inwards.

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Answer 2

Answer:

• The uniform linear motion the speed and direction of motion is fixed
• Uniform circular motion the speed is constant but the direction of motion changes continuously
• The motion of the blades and windmills
• The motion of electrons around its nucleus
• uniform circular motion is accelerated motion.

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