Question

JANUATILMIATIONAL SCHOOL POWAT
Motion in One Dimension - Std. 9 (20 marks)
1. What are scalar quantities? Give any two examples. (2)
2. What are vector quantities? Give any two examples. (2)
3. Rest and motion are relative. Give an example of the same. (2)
4. Define distance. State it's S.I. Unit. (2)
5. Give an example to illustrate that magnitude of displacement is either less than or equal to the
distance (2)
6. Give an example of motion in which displacement is zero, but the distance travelled is not zero.
(2)
7. Distinguish between Speed and Velocity (2)
8. A car is moving along a straight line covers a distance of I km due cast in 100 sec. Find: Speed
and Velocity. (2)
9. A car takes 3h to reach from station A to station B and then 5h to return back to station A. The
distance between the 2 stations is 240km. Find: (4)
i Total Distance travelled by the car
Total Displacement of the car
Average Speed of the car
Average velocity of the car​

Answer 1

1.Scalar quantities have only magnitude but no direction

Example distance speed

2.Vector quantities have magnitude as well as direction.

Example displacement velocity

3.If we are sitting in a bus and if we see person sitting inside the bus then we are at rest on the contrary if we see a pole or a tree outsude we infer that we are at motion thus it depends on the reference point which we choose.

4.if an object travels through a very curvy road

Answer 2

ANSWER WRITE IN ATTACHMENT WHICH ANSWER IS THIS WRITE WITH PENCIL IN ANSWER......

HERE IS YOUR ANSWER

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I

HOPE

ITS

HELPFUL

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