lec12 - 1) In water polo, a soft throw often splats when it...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
1) In water polo, a soft throw often “splats” when it bounces on the water but a hard throw usually “skips.” Which one is the best answer? A. The coefficient of restitution is small for the “splat” but large for the “skip.” B. The coefficient of restitution is large for the “splat” but small for the “skip.” C. The coefficient of restitution is the same for the two cases; it’s the coefficient of friction that changes. 2) In a hard water polo bounce off the water, the horizontal velocity hardly changes, so we know that A. The coefficient of restitution is large. B. The coefficient of friction is large. C. The coefficient of restitution is small. D. The coefficient of friction is small. E. None of these.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Note on Grades Mostly use an absolute scale (with adjustments if it seems unreasonable) . Tests Homework, Part., Warmup * Grade (Cutoff) 80% 90% A- 67% 80% B- 50% 70% C So, on Midterm, approximate letter grades are: 30 A-/B+ 25 B-/C+ 19 C/C- * after dropping lowest scores
Background image of page 2
L ECTURE 12: T ORQUE Torque (also called Moment) Equilibrium Levers
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Torque is the Force times the Lever Arm Hewitt
Background image of page 4
A longer lever arm produces more torque Wilson
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The perpendicular components determine the torque Hay
Background image of page 6
Variation of the lever arm (hence torque) in horizontal bar Dyson
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Directions of the torques on a bicycle wheel Brancazio
Background image of page 8
Treatment of two forces in calculating the net torque Hay/Dyson
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Increasing torque in platform diving Dyson.
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/12/2011 for the course PHYS 17 taught by Professor Mcwilliams,r during the Fall '08 term at UC Irvine.

Page1 / 26

lec12 - 1) In water polo, a soft throw often splats when it...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online