Use SUVAT where:
S = distance
U = initial velocity = 30m/s
V = end velocity = 0 m/s
A = acceleration = ?
T = time = 5 secs
then pick out the equation v = u + at
so:
0 = 30 + 5a
-30 / 5 = a
a = -6 m/s^2
Its C. Decreasing its mass
Answer:
0 m/s
Explanation:
if you look at the graph you will see that where the number 5 is there is a straight line meaning there is no motion.
no movement = no speed or distance, and without anything to calculate your answer has to be zero
