1. If the average velocity of an object is zero in some time-interval, what can you say about the displacement of the object for that time interval?

2. If B is added to A, under what conditions does the resultant vector have a magnitude equal to A+B? Under what conditions is the resultant vector equal to zero?

3. Car A travelling from Delhi to Ghaziabad, has a speed of 25 ms-1. Car B, travelling from Delhi to Gurgaon, also has a speed of 25 ms-1. Are their velocities equal? Explain.

4. Give one example of circular motion and one example of motion in a straight line.

5. A body moves in a straight line from O to P and then to Q. What is the value of (i) distance travelled by the body, and (ii) displacement of the body.

6. Look at fig. 7.7.
(i) What kind of motion does the graph represent?
(ii) What does the slope of the graph represent?

7. Look at fig. 7.8.
(i) What kind of motion does the graph represent?
(ii) What does the area under the graph represent?