Question

help needed in the following questions-

1. A particle moves over three quarters of a circle of radius r. What is the magnitude of its displacement?
2. What is the direction of velocity at any instant for a body in a uniform circular motion?
4. Draw distance time graph for
a. Car moving in a busy road
b. School bus parked in a school ground
c. Raj is jogging in a park with a speed of 5 m/s. 5. The brakes applied to a car produce an acceleration of 8 m/s2 in the opposite direction to the motion. If the car takes 4 s to stop after the application of breaks calculate the distance it travels during this time.
6. Are motion and rest absolute or relative? Explain with an example.
7. A car travels 100 km at a uniform aped of 40 km/h and the next 125 km at a uniform speed of 50 km/h. find average speed of the car.
8. What is average velocity? How it differs from average speed?
9. Earth revolves around the sun in a circular orbit with a uniform speed. Is this motion uniform or accelerated? Justify.
10. An object moving with a velocity 500m/s acquires a uniform acceleration of 125m/s2 in the direction of its initial motion.
(i) Calculate the time in which the object would acquire a velocity double of its initial velocity.
(ii) How much distance the object would cover in this time?

Answer 1

Explanation:

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