Question

1. Distinguish between speed and velocity.
2. Under what condition(s) is the magnitude of average velocity of an object equal to its average
speed?
3. Which of the two can be zero under certain condition: average speed or average velocity of a
moving body?
4. Give one example of a situation in which a body has a certain average speed but its average velocity
is zero.
5. When is a body said to have uniform velocity?
6. What conclusion can you draw about the velocity of a body if its the displacement-time graph is a
i. Straight line inclined to the time-axis.
ii. Curved line inclined to the time-axis.​

Answer 1

Answer:

1. answer: Speed is the distance travelled by an object,it is a scaler quantity where as Velocity is the distance travelled by an object per unit time in particular direction,it is a vector quantity.

2.answer: When the object moves along a straight line from an initial point A to a final point B and not to move back.

3.answer : Average velocity of a moving body.

4.answer: when the body moves along a straight line from A to B and moves back to A. Therefore, a body has covered a distance but it's average velocity( displacement) is zero.

5. answer: A body which covers equal distance in equal intervals of time is called uniform velocity.

6. answer: 1) it is uniform motion

2) non uniform motion.