A car of mass 800kg moves from rest on a horizontal track and travels 60m in 20s with uniform acceleration. Assuming there were no frictional forces, calculate the accelerating force
-
A.
240.0N -
B.
800.0N -
C.
1600.00N -
D.
2400.0N
Correct Answer: Option A
Explanation
S = at + (frac{1}{2} at^2)
60 = 0 x 20 + (frac{1}{2}) x a x 20
a = (frac{3}{10})m/s2
F = ma = 800 x (frac{3}{10} = 240N)