**Unformatted text preview: **Quiz 4
Circle your TA's name and write your name above. Each problem is worth 4 points.
a = EF
m
g= 9.80m/ s fx= UN fsSM,N ac=
= T=25r
V
Ax = vot + - at ?
X
1) If you twirl a ball at the end of a 65.5 cm string uniformly in a horizontal circle with a rotational period of
0.528 s, what is the centripetal acceleration of the ball?
a)/92.8 m/s
- b ) 7.79 m/5 2
c) 52.8 m/s?
d) 4.11 m/s2
e) 27.9 m/s2
givens 65 .5 cm = _
I m
100. cm
=, 655 m
t= 0. 528 5
1 0. 5785 = 271.
V
2) A coin sits on a flat turn table 17.4 cm from the center while the table spins. If the coefficient of static fricti
is 0.350 , what is the maximum speed the coin can have and not slip off the rotating turn table?
a) 5.62 m/s
b) 10.1 m/s
(C) 0.773 m/s
d) 3.43 m/s
e) 1.44 m/s
1: 124 cm = 0. 0174 m
174 1
Us: D. 380
m
m
Js ? MS
U
: 10.350 gar
6. 35 mug...

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- Fall '18
- Quiz