| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Specify the velocity of the puck.
Answer: $29\ m/s\ \left(\approx104\ km/h\right)$
Exercise 3.5 B
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Specify the velocity of the bandy ball.
Answer: $32\ m/s\ \left(\approx115\ km/h\right)$
Exercise 3.5 C
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Specify the velocity of the tennis ball.
Answer: $39\ m/s\ \left(\approx140\ km/h\right)$
Exercise 3.5 D
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Specify the velocity of the frisbee.
Answer: $17\ m/s\ \left(\approx59\ km/h\right)$
Exercise 3.5 E
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Determine velocity of the bubble.
Tip: Measure the time spent by the bubble at certain distances and move the values to the (t, s) coordinate system. Fit a straight line to the points. What can you expect from the slope of the line?
Answer: $0{,}07\ m/s$
Exercise 3.5 F
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Find out at what angle the speed of a bubble is the greatest? Show the results graphically.
Tip: Place the observation values for each angle in the (t, s) -coordinate system.
Answer: 45°
