DP Physics (last assessment 2024)
Question 18M.3.SL.TZ1.a
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.SL.TZ1.a |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | Show that | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
18M.3.SL.TZ1.a
A constant force of 50.0 N is applied tangentially to the outer edge of a merry-go-round. The following diagram shows the view from above.
The merry-go-round has a moment of inertia of 450 kg m2 about a vertical axis. The merry-go-round has a diameter of 4.00 m.
Show that the angular acceleration of the merry-go-round is 0.2 rad s–2.
[2]
Markscheme
Γ «= Fr = 50 × 2» = 100 «Nm»
α « » =0.22 «rads–2»
Final value to at least 2 sig figs, OR clear working with substitution required for mark.
[2 marks]
