DP Physics (last assessment 2024)
Question 18M.3.SL.TZ1.b.ii
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.3.SL.TZ1.b.ii |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | Calculate | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 1]
18M.3.SL.TZ1.b.ii
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.
The merry-go-round starts from rest and the force is applied for one complete revolution.
Calculate, for the merry-go-round after one revolution, the angular momentum.
[1]
Markscheme
«L = Iω = 450 × 1.66»
= 750 «kgm2 rads–1»
Accept BCA, values in the range: 710 to 780.
[1 mark]
