Physics

Problem

A particle moves along a straight track with an initial velocity of

10\,\text{m\,s}^{-1}

. It experiences a constant retardation of

2\,\text{m\,s}^{-2}

for

3\,\text{s}

and then a constant acceleration of

1\,\text{m\,s}^{-2}

for the next

5\,\text{s}

. a. (a) Determine its velocity at the end of the

8\,\text{s}

motion. b. (b) Calculate the total displacement during these

8\,\text{s}