Question

If a car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes for 3.0 seconds, causing a uniform acceleration of - 2.1 m/s2.

a) Sketch the velocity vs. time graph for the car and paste your sketch in the space below.

b) How fast is the car going at the end of the braking period?

c) How far has it gone at the end of the braking period?


d) Name the three controls on an automobile which cause acceleration

Answer 1

a) I cant sketch it. Uniform acceleration means a linear increase of velocity (slope=acceleration). brakes mean a decrease in velocity, again, slope= acceleration.

b.calculate it.
c. distance= average velocity*time
d. steering wheel, accelerator, brakes,

Answer 2

A) v=u+at