Question

There are two horizontal forces on the 2.0 kg box in the overhead view of Fig. 5-39 but only one (of magnitude F1 = 20 N) is shown. The box moves along the x axis. For each of the following values for the acceleration ax of the box, find the second force in unit-vector notation: (a) 10 m/s2, (b) 20 m/s2, (c) 0, (d) − 10 m/s2, and (e) −20 m/s2.

Answer 1

The vector sum of F1 and "the second force (F2) " = M a

if a = 0, F1 = -F2

Answer 2

Okay, well what's the procedure when a isn't = to zero?

Answer 3

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