1. The following equation is derived from Newton's Second Law of Motion. A body of mass has a Force of 20 N/s and an acceleration of 50 m/s2. What's the mass of the object?

A. 0.8 kg

B. 0.5 kg

C. 0.4 kg

D. 1.5 kg

Newton's second law for an object's motion in one spatial dimension:

F = ma

F is the net force acting on the object, m is the object's mass, and a is the object's acceleration.

Given values:

F = 20N

a = 50m/s²

Plug in these values and solve for m:

20 = m (50)

m = 0.4kg

Choice C