Question 23M.3.HL.TZ1.10
| Date | May 2023 | Marks available | [Maximum mark: 5] | Reference code | 23M.3.HL.TZ1.10 |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Calculate, Draw, Explain, Label, State | Question number | 10 | Adapted from | N/A |
A sphere floats in water. The sphere is pushed downwards by a small amount and is then released.
Draw and label on diagram B the forces acting on the sphere just after it has been released.
[1]
buoyancy force greater than weight ✓
Award [1] for correct labeling AND relative size.
Allow any point, where the forces are drawn.
A ball on a water surface. Well done; just in calculating the Q factor, some omitted squares of amplitudes, and weaker students did not use the formula correctly.
After it is released, the sphere performs damped oscillations. The graph shows the variation with time t of the amplitude of oscillations A.
Calculate the Q factor for this system.
[2]
considering consecutive amplitudes ✓
Q = «» = 14 ✓
The water is replaced by another liquid of higher viscosity. State and explain the effect of this on the Q factor of the system.
[2]
Q will decrease ✓
higher viscosity provides more damping/higher energy dissipated per cycle ✓