Chapter 13: Motion and Time

Q.1 Identify the wrong one:

(a)Second is the unit of time.

(b)The speed of all objects are same.

(c)Measurement of distance between two cities is in kilometers.

(d)The pendulum time period is not constant.

(e)The train speed is expressed in m/h

Q.2.A pendulum takes 40s to complete 25 oscillations. Find the pendulum’s time period.

Q.3. Two stations are 450km apart. A train takes 6hrs to cover this distance. What is the train’s speed?

  

Q.4. Draw the distance-time graph for the following case:

(a) A car moving at a constant speed.

(b) A car parked on a side road.

Q.5.The unit of speed is:

(a) km/min (b) m/min (c) km/h (d) m/s

 Q.6.The distance-time graph for the motion of two vehicles X and Y are shown below. Which of the following moves fast?

Q.7. Identify the one in which the truck is not moving with a constant speed from the given distance-time graph.