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
-
240.0N
- 800.0N
- 1600.00N
- 2400.0N
The correct answer is: 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 \(\frac{3}{10} = 240N\)