Paper 2 · Kinematics and Dynamics
State the condition (in terms of the forces acting) under which an object travels at terminal velocity.
Model answer
no resultant force acts on it
Also accepted: resultant force is zero, net force on it is zero
Explanation: An object moves at terminal (constant) velocity when the resultant force acting on it is zero, so by Newton's first law it has zero acceleration.
Derived from ZIMSEC Physics Paper 2, November 2003, Q1