SAMPLE: History
Film Science: Questions for A Knight's Tale
1. The lances used by knights in tournaments are made of what material?
2. A peasant tending to the arena bends low to push with 70 N on the handle of a 1.2 kg rake that dips at 200 into soil. If the µ is 1.6, what weight of soil can be moved?
3. Why can we say hoof marks in the earth are instantaneous position marks?
4. A horse rears and then gallops down the lists. Name its: a) point of reference b) frame of reference.
5. At the end of three seconds, a warhorse accelerating at 0.8 m/s2 will reach what speed?
6. What is the evidence William's visor received an impulse from his opponent's lance?
7. If William's horse accelerates for eight seconds while moving 50 m, what is its final speed?
8. The 70 kg, 3 m wide quintain spins at 4.7 m/s. What is its angular momentum?
9. What is the final speed of a horse that accelerates at 1.1 m/s2 for a distance of 13 m?
10. A horse will travel what distance while accelerating at 1.2 m/s2 for 4 seconds?
11. What centripetal acceleration keeps the tip of a knight's sword spinning in 2.4 m radius in 2.3 s?
12. a) Draw a t-p graph for Chaucer's motion in the first few moments after we first meet him.
b) How would we find his speed from the t-p graph?
13. A 120 kg chest is supported by a rope slung between two squires. The left segment of rope angles up at 300 and the right angles up at 400. Find the tension in both segments of rope.
14. A 10 kg sword swung at 4.6 m/s to the right clangs into a 9 kg sword swing at it at 3.2 m/s to the left. After the impact, the second sword bounces back at 0.3 m/s. What is the speed of the first sword?
15. At the ball, a 30 cm tassel on a sleeve decoration swings to and fro. Find its period.
16. The 190 kg testing beam hits 85 kg William at 2.6 m/s to the right and stops. Find his speed.
17. What is the velocity of a sword tip moving in a 1.8 m radius in 1.4 s?
18. What centripetal force keeps a 15 kg sword moving in a 1.7 m radius in 2.4 s?
19. A horse pulls through a stirrup with 3 500 N, 280. If the µ is 2.5, what weight of armour could be piled on a 95 kg fallen knight being dragged along the lists?
20. a) What is the momentum of Sir Ulrich, 95 kg, moving at 2.7 m/s?
b) Count Adhenar's lance bashing into him with 250 N for 0.8 s delivers what impulse?
c) What is Ulrich's momentum change?
d) What is his new speed?
21. Would lances deliver more or less impulse by shattering on impact?
22. The mini-rack did what work on William's shoulder if its 80 N force moved it 1.7 cm? (W = Fd)
23. A helmet flies off at 25 m/s, 200. How far downrange does it travel?
24. What is the physical evidence of the impulses received by William?
25. If the ferrymen pull with 140 N to move the 3 000 kg ferry, what is the µ?
26. William's lance falls 3.5 m from his weakened grip. What is its impact speed?
27. A 20 kg lance carried 3 m above the ground has what potential energy? (PE = ½ mgh)
28. a) At 2.2 s, a horse is 5 m along the barriers; at 10.6 s, it is at 35 m. Find its average velocity.
b) How far would it gallop in 13 s?
c) Draw a t-v graph for the 13 s.
d) How could you find the distance the horse travelled from the t-v graph?
29. A lady seated in a box 5 m above the lists tosses her ribbon at 12 m/s, 400. Where does it land?
30. Find the gravitational acceleration at a spot 80 km in the starry sky above Jocelyn and William.
31. Find the gravitational attraction between two 35 g cupids 37 m apart, looking down on them.