Science
posted by Brenda on .
Calulate the force needed to accelerate a 2,300 kg mass at 5.5m/s/s acceleration.

Have you tried Newton's old reliable #2?
F = m a
m = mass, kg
a = acceleration, m/s^2
F = Force, newtons 
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Find the force needed accelerate a 3 kg object at 4m.s