12. A magazine rack has a center of mass 10 cm above the floor as shown in the figure at right. Through what maximum angle (in degrees) can the rack be tilted without falling over? End view a) 8.9° b) 14.0° c) 26.6° d) 32.1° e) 47.3° 10 cm 5.0 cm
12. A magazine rack has a center of mass 10 cm above the floor as shown in the figure at right. Through what maximum angle (in degrees) can the rack be tilted without falling over? End view a) 8.9° b) 14.0° c) 26.6° d) 32.1° e) 47.3° 10 cm 5.0 cm
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Transcribed Image Text:12. A magazine rack has a center of mass 10 cm above the floor as shown
in the figure at right. Through what maximum angle (in degrees) can
the rack be tilted without falling over?
End
a) 8.9°
b) 14.0°
c) 26.6°
d) 32.1°
e) 47.3°
10 cm
view
5.0 cm
13. A large truck and a very small car have a head-on collision. The change in momentum of the
truck is
the change in momentum of the car. (Consider only the magnitudes.)
a) greater than
b) less than
c) equal to
14. A collision between a fully-inflated basketball and the floor is
a) elastic.
b) inelastic.
c) completely inelastic.
d) both elastic and completely inelastic.
15. Three point masses are shown in the figure below. Notice that the origin of the coordinate system
is located at the center of the leftmost particle. Also, the diagram is NOT drawn to scale.
Determine the y-coordinate of the center of mass (yem).
1.5 kg
a) 7.50 cm
b) 3.75 cm
c) 1.88 cm
d) 9.38 cm
e) 5.63 cm
40 cm
20 cm
1.0 kg
1.5 kg
r = 0
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