Question
A force of 40.0 N is applied in the positive x-direction to a block of mass 7.25 kg, at rest on a frictionless surface.
 
(a)
What is the block's acceleration (in m/s2)? (Indicate the direction with the sign of your answer.)
 
(b)
How fast is it going (in m/s) after 4.00 s?

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