A car of mass 800kg moves from rest on a horizo... - WAEC Physics 2007 Question
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 option: a
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)
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