inertia of the orange. centripetal force of the orange. the friction acting on the orange. the balanced forces acting on the orange.
I gave my students this multiple choice question: A student walking quickly while carrying an orange on his lunch tray stops suddenly. The orange will most likely roll off the tray due to

Only one answer is correct among these 4 choices:
- inertia of the orange.
- centripetal force of the orange.
- the friction acting on the orange.
- the balanced forces acting on the orange.

Could you tell me which one is correct?

inertia of the orange.