A particle moves along a straight line

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A particle moves along a straight line. Its velocity

v(t)

(in m/s) is described as follows: it increases linearly from

0

t=0

6

t=3

and then remains constant at

6

for

3<t\le 5

. Which statement best describes the particle's acceleration on

0<t\le 5

s? (a) It is constant at

2\text{ m/s}^2

for the entire interval. (b) It is

0\text{ m/s}^2

for

0<t<3

and

2\text{ m/s}^2

for

3<t\le 5

.⁠ (c) It is

2\text{ m/s}^2

for

0<t<3

and

0\text{ m/s}^2

for

3<t\le 5

.⁠ (d) It is

-2\text{ m/s}^2

for

0<t<3

and

0\text{ m/s}^2

for

3<t\le 5

.⁠