Question

A. State whether the acceleration is positive, negative or zero for each section in the speed versus

time graph.

Answer 1

a=positive

b=0

c=positive

d=negative

Step-by-step explanation:

a=acceleration depends on the speed and time. if the speed and time are increasing at the same rate, the acceleration value will be positive as the vehicle is speeding up.

b=the speed and time are not increasing, therefore the vehicle is either stationary or travelling at a steady pace.

c=same explanation as a

d=the speed and time are not increasing at the same rate as the speed is decreasing. this means that the car is slowing down