Question

Suppose that F1 → = +9.0 N and the mass of the box is 3.0 kg. Find the magnitude and direction of F2 → when the acceleration of the box is (a) +5.0 m/s2 , (b) −5.0 m/s2 , and (c) 0 m/s2 .

Answer 1

Step-by-step explanation:

Fnet = ma

a.) (9N + F₂)(3.0 kg) = 5.0 m/s²

9N + F₂ = (5.0 m/s²) / (3.0 kg)

F₂ = 15 N - 9 N = 6 N →

b.) 9N + F₂ = (-5.0 m/s²) / (3.0 kg)

F₂ = -15 N - 9 N = -24 N ←

c.) 9N + F₂ = (0.0 m/s²) / (3.0 kg)

9N + F₂ = 0

F₂ = -9N ←