Author Question: A car is moving along a straight highway and accelerates at a constant rate while going from point A ... (Read 32 times)

Sufayan.ah · **on:** Jul 28, 2018

A car is moving along a straight highway and accelerates at a constant rate while going from point A to point B. If the acceleration is positive, increasing the speed of the car, where does the position where the instantaneous speed equals the average speed occur for the interval from A to B?
a. midway between A and B
c. closer to B than to A
b. closer to A than to B
d. Any of the answers could be correct depending on the original speed.

Question 2

A runner circles a track of radius 100 m in 100 s moving at a constant rate. If the runner was initially moving east, what has been the runner's average acceleration when halfway around the track?
a. At a constant rate, the average acceleration would be zero.
b. 0.13 m/s2, south
c. 0.25 m/s2, west
d. No answer is correct.