g A 50 kg box is resting on a horizontal surface. Results for item 1. 1 1 / 1 point Determine the weight of the box in [N]. Correct 490 Results for item 2. 2 1 / 1 point Determine the magnitude of the normal force acting on the box in [N]. Correct 490 Results for item 3. 3 0 / 1 point Find the magnitude of the upward applied force, in [N], necessary to lift the box with an acceleration of 1 m/s2

(a) 490 N

(b) 490 N

(c) 540 N

Explanation:

mass, m = 50 kg

acceleration, a = 1 m/s2

(a) The weight is given by

W = m g = 50 x 9.8 = 490 N

(b) The normal force is

N = m g = 490 N

(c) Let the force required is F.

Use Newton's second law

F - m g = m a

F = m(g + a)

F = 50(9.8 + 1)

F = 540 N

positive reinforcement? ?

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it