A motor vehicle is brought to rest from a speed of 15ms-1 in 20 seconds. Calculate the retardation.
-
A.
0.75ms-1 -
B.
1.33ms-2 -
C.
5.00ms-2 -
D.
7.50ms-2
Correct Answer: Option A
Explanation
Retardation = (frac{u – v}{t})
= (frac{15 -0}{20})
= 0.75ms-1