DP Physics (last assessment 2024)
Question 21N.2.SL.TZ0.d.ii
| Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.2.SL.TZ0.d.ii |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Suggest | Question number | d.ii | Adapted from | N/A |
d.ii.
[Maximum mark: 1]
21N.2.SL.TZ0.d.ii
A ball of mass 0.250 kg is released from rest at time t = 0, from a height H above a horizontal floor.
The graph shows the variation with time t of the velocity v of the ball. Air resistance is negligible. Take g = −9.80 m s−2. The ball reaches the floor after 1.0 s.
Suggest why the momentum of the ball was not conserved during the collision with the floor.
[1]
Markscheme
there is an external force acting on the ball
OR
some momentum is transferred to the floor ✓
Allow references to impulse instead of force.
Do not award references to energy.
