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Newton’s second law

AP.PHYS: INT‑3.B (EU), INT‑3.B.1 (EK), INT‑3.B.1.1 (LO), INT‑3.B.1.3 (LO), INT‑3.B.2 (EK), INT‑3.B.2.1 (LO)


A 2, start text, space, k, g, end text mass is placed on an inclined plane. A 3, start text, space, N, end text, a 4, start text, space, N, end text, and a 5, start text, space, N, end text force each act on the mass, as shown on the free body diagram below. There are no other forces acting.
A small dot sits on an inclined plane that slopes upward from left to right. Three arrows point out of the dot. An arrow parallel to the plane, labeled three N, points toward the top of the plane, or up and to the right. A vertical arrow labeled five N points straight down from the dot. An arrow labeled four N points up and to the left. This arrow is perpendicular to the plane.
What is the magnitude of the acceleration of the mass?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction