Question

1. The tip of a robot arm is moving to the right at 8 m/s. Four seconds later, it is moving to the

left at 2m/s. a) What is the change in velocity and b) what is the acceleration.

Answer 1

Step-by-step explanation:

initial velocity = 8m/s

final velocity= 2m/s

Change in velocity= final velocity - initial velocity

= 2m/s - 8m/s

= -6m/s

Acceleration= rate of change of velocity,

=> a = ∆v / t

=> a = -6m/s ÷ 4

=> a = -1.5m/s²