How fast is it going after the 3 seconds, in m/s, if it started from rest?

Question

A 20 kg box is slid on the ground with k = 0.2, with 100 N of pushing force for 3 seconds. How fast is it going after the 3 seconds, in m/s, if it started from rest?

Answer 1

First you can find the net force on the box using the same process I outlined in your other calculator problem.

1. Then, use F = ma to find the acceleration on the block.
2. Then use your 1-d motion equations to find the final speed
3. You just found a
4. v_i = 0m/s since it started from rest.
5. t = 3s
6. v_f = v_i + at