Question

Two horizontal forces, and , are acting on a box, but only is shown in the drawing. can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that = +8.3 N and the mass of the box is 4.5 kg. Find the magnitude and direction of when the acceleration of the box is (a) +6.1 m/s2, (b) -6.1 m/s2, and (c) 0 m /s2.

Answer 1

Bill, please clarify your problem by adding the missing words.

Answer 2

Fnet= F1 + F2

Fnet=mass * acceleration

+8.3+ F2= (4.5)a

A) F2= (4.5)(+6.1) - 8.3
B) F2= (4.5)(-6.1) - 8.3
C) F2= 0 - 8.3