Question

A van traveling down a slope with a uniform acceleration of 2.15 meters/second2 attains a speed of 20.00 meters/second after 7.00 seconds. What is the initial velocity of the van?
A. 0.00 meters/second
B. 3.65 meters/second
C. 4.95 meters/second
D. 35.05 meters/second
E. 120.75 meters/second

Answer 1

Final velocity = initial velocity + (acceleration*time)

That is v = u + at

So 20 = u + (2.15*7)

20 = u + 15.05

Thus, u = 20 - 15.05 = 4.95