Motion chapter of physics of class 9.please give me some questions .I request you.
Answers
Answer:
WHAT IS CIRCULAR MOTION ? HOW IS IT DIFFRENT FROM NORMAL MOTION ?
Explanation:
Answer:
1. What are the types of motion? Explain each of them
2. (a) Identify the kind of motion in the following cases:
(i) A car moving with constant speed turning around a curve.
(ii) An electron orbitting around nucleus.
(b) An artificial satellite is moving in a circular orbit of radius 36,000 km. Calculate its speed if it takes 24 hours to revolve around the earth.
3. Define acceleration and state its SI unit. For motion along a straight line, when do we consider the acceleration to be (i) positive (ii) negative? Give an example of a body in uniform acceleration
4. A car travels at 54 km/h for first 20 s, 36 km/h for next 30 s and finally 18 km/h for next 10 s. Find its average speed.
5. Define acceleration and give its SI unit. When is acceleration of a body negative? Give two examples of situations in which acceleration of the body is negative.
6. Distinguish between uniform motion and non, uniform motion. Is uniformly accelerated motion uniform motion? Give one example each of uniform and non-uniform motion.
7. Define uniform circular motion and give example of it. Why is it called accelerated motion?
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