**Unformatted text preview: **Quiz 6
Physics 1250
Circle your TA's name and write your name above. Each problem is worth 4 points.
EF
a=2
m
9=9.80m/s? AP=1=(Fex()avg At P,=P XCOM =M total
( mix , + m z * 2 + . )
P= mv = Fat
1) A ping pong ball with a mass of 2.7 grams falls straight down and hits the surface of a table with a velocity of
4.5-m/s and bounces back straight up leaving the table with a velocity of 3.3 m/s. What is the impulse the ball
received from the table?
a) ON's
b) 1. 1 N.s
C) 0.52 N.S
d) 0 .021 N . s
(@) 0.0032 N'S
given m. 7 7 grams
J: 4.Smis
vr : 3 3 mmis
I = AP
I = ?
VA- vi = t
A
2) A pair of identical twins, each 25 kg, are sitting side-by-side at the very end of a 3.0 m long canoe. How far
from the middle of the canoe is the center-of-mass of the twins-canoe system if the canoe has a mass of 71 kg
and the canoe's own center-of-mass is in its middle? ?
a) 31 cm
b) 62 cm
c) 88 cm
d) 150 cm
e) 0 cm
m, : 25Vg
m ?
X : a Rom
X
com :
( 2 5 0 1.5 + 78 . 1 5 + 7/80)
M: Ting
71 +80...

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