When the object is moving at a constant velocity on the rough surface _______.
A. net force on the object is zero
B. no force acts on the object
C. only external force acts on the object
D. only kinetic friction acts on the object
Answer:A
When the object is moving at a constant velocity on the rough surface _______.
A. net force on the object is zero B. no force acts on the object C. only external force acts on the object D. only kinetic friction acts on the object