(2a + 3b + 1) - (3a + 5b) - (2a - 2b – 3)

4- 3a

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk