Q11 · 2021 · Paper 1Simple familiar1 mark
QUESTION 11
Uniform circular motion occurs when an object is travelling in a circle at a constant
(A)
speed, due to a force of constant magnitude acting in a parallel direction to its velocity.
(B)
velocity, due to a force of constant magnitude acting in a parallel direction to its speed.
(C)
speed, due to a force of constant magnitude acting in a perpendicular direction to its velocity.
(D)
velocity, due to a force of constant magnitude acting in a perpendicular direction to its speed.
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
In uniform circular motion the speed is constant while the velocity direction changes; the centripetal force has constant magnitude and is perpendicular to the instantaneous velocity. Option C.
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.