A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s². For the next 20 s, the acceleration of the particle is −1.0 cm/s². What is the position of the particle at the end of this motion? A)zero B)+3.0 m C)−1.0 m D)+2.0 m E)−3.0 m

Question

Quizplus · Accepted Answer

The particle first accelerates at +2.0 cm/s² for 10 s, reaching a velocity of 20 cm/s and covering a distance of 100 cm. Then, it decelerates at -1.0 cm/s² for 20 s, coming to rest after 20 s and covering an additional 200 cm. The total distance is 300 cm, or +3.0 m.

A Particle Starts from Rest at Xi = 0 and Moves