A car starts from rest and covers a distance of 40m in 10s. Calculate the magnitude of its acceleration
-
A.
0.25ms-2 -
B.
0.80ms-2 -
C.
3.20ms-2 -
D.
4.00ms-2
Correct Answer: Option B
Explanation
S = ut + (frac{1}{2} at^2)
40 = 0 x 10 + (frac{1}{2}) x a x 102
50a = 40
a = (frac{40}{50})
= 0.8ms-2