IB Physics HL A.2.24 Circular Motion Dynamics

Practise analysing HL centripetal-force systems, including orbital motion, loops, banked roads and vertical circles.

Exam points

identify the real force that supplies centripetal force in a circular-motion situation
apply F=mv²/r or equivalent radial force balance to calculate centripetal force
explain that centripetal force is not an extra force but the inward resultant of existing interactions

[Maximum number: 1]

Aibhe and Euan are sitting on opposite sides of a merry-go-round, which is rotating at constant speed around a fixed centre. The diagram below shows the view from above.

Figure for Question A.2.24—Centripetal force question 1 — IB Physics HL

Aibhe is moving at speed $1.0 \mathrm{~m} \mathrm{~s}^{-1}$ relative to the ground.

Identify the force that is causing Aibhe to move in a circle.

All question bank results loaded

A.2.24—Centripetal force question 1