Answer:
-0.5 ms^-2
Step-by-step explanation:
The initial velocity (u) = 2 ms-1
Final velocity (v) = 2 ms-1
Time taken (t) = 8 seconds
However the question clearly says that the final velocity is in opposite direction to the initial velocity. This implies that we have (-v), final velocity in opposite direction.
We must recall that vectors in opposite direction are commonly shown using a negative sign. Velocity is a vector, hence it possesses both magnitude and direction as we can see from the question.
Hence;
From a= v-u/t
a= (-2) - 2 / 8 = -0.5 ms^-2
Hence the acceleration of the crate is -0.5 ms^-2
