6. Intro to Forces (Dynamics)
Forces in 2D
Multiple Choice
Multiple ChoiceThree horizontal forces act on a box (mass = 8 kg) sitting on a smooth surface. F1 is 30 N acting at 53° counterclockwise from the +x axis, F2 is 13 N acting at 67.4° clockwise from the +x axis, and F3 is 20 N directly along the -x axis. What are the magnitude and direction of the box's acceleration?
A
1.5 m/s2, 14° ccw from +x-axis
B
1.5 m/s2, 76° ccw from +x-axis
C
6.9 m/s2, 1.1° cw from +x-axis
D
1.5 m/s2, 0.46° cw from +x-axis
568
4
2
8:21m
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