A crate slides across a horizontal floor while experiencing a kinetic friction force…
PHYSICS · Subjective · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
A 4.0kg crate slides across a horizontal floor while experiencing a kinetic friction force of 6.0N opposite its motion. The Earth is included in the defined system along with the crate. Classify the kinetic friction force as internal or external to the system, and explain your reasoning in one sentence.