1. PHYSICS

2. Answers to Quiz 9 1) A 180N . . . 1) 90N 2) 4.81m 3) 4) 0.065 5) 771J
Monday, 12/15/08 PHYSICS
Answers to Quiz 9
1) A 180N . . .
1) 90N
2) 4.81m 3)
4) 0.065
5) 771J
6) -600J
7) 0J
8) 1.6 x 107J
9) 3.92 x 108J
10) 8.0 x 105kgm/s
11) 6.67g
12) 1500J
1) A 200N . . .
1) 100N
2) 58.2m 3)
4) 0.050
5) 643J
6) -500J
7) 0J
8) 3.13 x 107J
9) 2.45 x 108J
10) 1.25 x 106kgm/s
11) 7.5g
12) 1200J

7. If you do the same old things, you get the same old results!
Monday, 12/15/08 PHYSICS
If you do the same old things,
you get the same old results!
RECALL:
ptotal initial = ptotal final
if no NET external force is acting
(*demo carts*)
energy demos 1/2 balls and astroblaster
ex. After being struck by a bowling ball, a 1.5kg bowling pin sliding to the right at 3.0m/s collides head-on with another 1.5kg bowling pin initially at rest. Find the final velocity of the second pin if the first pin moves to the right after the collision at 0.5m/s.
2.5m/s to the right