Answers

2016-06-23T21:09:15+08:00
If you're looking for the acceleration;the answer is 20m/s^2
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I'm looking for the initial velocity
2016-06-24T06:42:27+08:00
A = f/m
= 40 kg m/s^2 / 2 kg
= 20 m/s^2

/:. 20 m/s^2 to stop it in 10 seconds.
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