A. 240.0N
B. 800.0N
C. 1600.00N
D. 2400.0N
Correct Answer: Option A
A. 240.0N
Explanation
S = at + ½at²
60 = 0 x 20 + ½ x a x 20
a = 310m/s²
F = ma = 800 x 310=240N
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