Question

7. Draw the shape of the distance-time graph for uniform and non-uniform motion of object. A bus of starting from

rest moves with uniform acceleration of 0.1 ms–2 for 2 minutes. Find(a) the speed acquired.

(b) the distance travelled.

8. (a) Define uniform acceleration. What is the acceleration of a body moving with uniform velocity?

(b) A particle moves over three quarters of a circle of radius r. What is the magnitude of its displacement?

9. A bus accelerates uniformly from 54 km/h to 72 km/h in 10 seconds Calculate

(i) acceleration in m/s2

(ii) distance covered by the bus in metres during this interval.

10. A car moves with a speed of 30 km/h–1 for half an hour, 25 km/h–1 for one hour and 40 km/h–1 for two hours.

Calculate the average speed of the car.

11. Derive the equation for velocity-time relation (v = u + at) by graphical method.

12. A car is travelling at 20 km/h, it speeds upto 60 km/h in 6 seconds. What is its acceleration?

13. A car accelerates from 6 ms–1 16 ms–1 in 10 sec. Calculate

(a) the acceleration and

(b) the distance covered by the car in that time.

14. A circular track has a circumference of 3140 m with AB as one of its diameter. A scooterist moves from A to B

alone the circular path with a uniform speed of 10 m/s. Find

(a) distance covered by the scooterist,

(b) displacement of the scooterist, and

(c) time taken by the scooterist in reaching from A to B.

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

(b) Write any four examples of uniform circular motion.

(c) Is uniform circular motion accelerated motion?​

Answer 1

Answer:

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Answer 2

Answer:

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