Answer: Change in velocity: -10 m/s, acceleration=-2.5m/s
Explanation:
The question in english is written below:
The end of a robotic arm moves to the right at 8m s. Four seconds later it moves to the left at 2m/s. What is its change in velocity and what is its change in acceleration?
We have the following data:
Initial Velocity of the robotic arm: (to the right)
Final Velocity of the robotic arm: (to the left)
Variation in time:
Firstly we have to calculate the change in velocity , which is given by the following equation:
This means the resultant velocity is to the left
Now, we can find the acceleration , given by:
This means the acceleration is also to the left, however its magnitude is always positive: