Q6 · 2025 · Paper 1Simple familiar1 mark
QUESTION 6
Which moving object has an inertial frame of reference?
(A)
a ball dropping off a balcony
(B)
a boat slowing down to dock
(C)
a plane travelling at a constant velocity
(D)
a car driving at 150 km h−1 around a circular racetrack
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
An inertial frame has no acceleration. A plane travelling at constant velocity is therefore inertial. Option C.
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.