FE Civil Engineering Exam Prep

Answer: D - The acceleration of a 2.2 kg object sliding across a smooth surface with a net force of 1.6 N to the right acting on it is 0.73 m/s² to the right.

Solution

Use Newton’s Second Law
Σ F = ma

Where Σ F = net force = 1.6 N to the right

m = mass = 2.2 kg

a = acceleration

Σ F = ma, so a = Σ F/m

a = 1.6 N / 2.2 kg

1 N = 1 kgm/s², so

a = (1.6 kg m/s²)/2.2 kg = 0.73 m/s²