Author Question: An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance ... (Read 77 times)

pepyto · **on:** Jul 28, 2018

An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 200 m. What is the (constant) acceleration of the vehicle during this time?
a. 8.0 m/s
b. 9.6 m/s
c. 12 m/s
d. 6.9 m/s
e. 0.20 m/s

Question 2

A particle moving with a constant acceleration has a velocity of 20 cm/s when its position is x = 10 cm. Its position 7.0 s later is x = -30 cm. What is the acceleration of the particle?
a. -7.3 cm/s2
b. -8.9 cm/s2
c. -11 cm/s2
d. -15 cm/s2
e. -13 cm/s2