Question

VI. Answer briefly.
1. Show the shape of the distance - time
graph for the motion in the following cases
,
a. A bus moving with a constant speed,
b. A car parked on a road side.
2. Distinguish between speed and velocity.
3. What do you mean by constant acceleration?
4. What is centre of gravity?​

Answer 1

cross

Explanation:

straight line

constant

same speed

Answer 2

1)) (a) 1)) (b)

2)) Speed :

(i) Speed is defined as the distance travelled by the body per unit time

(ii) Speed =

timetaken

distancetravelled

(iii) Speed is always positive

Velocity :

(i) Velocity of a moving body is defined as is rate of change of its position with time in a particular direction

(ii) Velocity =

timetaken

displacement

(iii) Velocity is a vector quantity

(iv) Velocity can be negative

3)) Uniform acceleration refers to an object moving with constant acceleration w.r.t. time.

4)) a point from which the weight of a body or system may be considered to act. In uniform gravity it is the same as the centre of mass.

Explanation:

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