A rolling desk chair has a mass of 8 kg and an initial velocity of 6 m/s. The chair is given an acceleration of 12 m/s² for 3s. What is the magnitude of the net force on the chair during acceleration?
96 N

48 N

144 N

288 N

Net force = 96 N

Explanation:

Given:

Mass m = 8 kg

Initial velocity = 6 m/s

Acceleration a = 12 m/s²

Time = 3 s

Find:

Net force

Computation:

v = u + at

v = 6 + (12)(3)

v = 42 m/s

Work down = (1/2)(8)(42² - 6²)

Work down = 6,912

s = ut + (1/2)(a)(t)²

s = (6)(3) + (1/2)(12)(3)²

s = 18 + 54

Displacement (s) = 72 m

Net force = Work down / Displacement

Net force = 6,912 / 72

Net force = 96 N

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.