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

Answer 1

Answer:

For uniform motion, the distance-time graph is a straight line parallel to the time axis as speed will be constant. The distance-time graph for non-uniform motion is not a straight line since speed is variable, it can be a curve or a zigzag line.