Author Question: An x-t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = ... (Read 47 times)

mia · **on:** Jul 28, 2018

An x-t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 6 s the velocity of the ball is zero. We can be positive that at t = 6 s,
a. the slope of the curve is non-zero.
b. the acceleration is constant.
c. the ball has stopped. d. none of the above answers is always correct.

Question 2

A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 8.00 s. What is the speed after the first 5.00 s of acceleration? (Hint: First convert the speed to m/s.)
a. 34.7 m/s
c. 23.1 m/s
b. 44.4 m/s
d. 17.4 m/s