A 2.5-kg block slides across a frictionless table toward a horizontal spring.As the block bounces off the spring, a probe measures the velocity of the block (initially negative, moving away from the probe) over time as follows:
| Velocity (m/s) | Time (s) |
| −12.0 | 0 |
| −10.0 | 0.10 |
| −6.0 | 0.20 |
| 0 | 0.30 |
| 6.0 | 0.40 |
| 10.0 | 0.50 |
| 12.0 | 0.60 |
What is the average force exerted on the block by the spring over the entire 0.60-s time interval of the collision?
- 50 N
- 60 N
- 100 N
- 120 N
OpenStax College Physics 2e, 8.2 Impulse, exercise 5