Abington Heights High School
Chapter 13 - Practice Quiz 3
Select the answer that best completes the question.
1. The spring constant for the spring in a special cannon is 1800 N/m. In cocking the cannon, the spring is compressed 0.55 m. What is the initial speed of a 7.0-kg cannonball at rest on the free end of the spring when it is released?
A.77 m/s
B.140 m/s
C.12 m/s
D.8.8 m/s
E.16 m/s


2. A spring with a spring constant k = 1600 N/m is at rest on the bottom of an inclined plane. A 7.0-kg block slides down the plane and makes contact with the spring at point A as shown. After contact, the spring is compressed to point B, 0.20 m from point A, where the speed of the block is zero m/s. What was the speed of the block just before contact with the spring?

A.3.2 m/s
B.12 m/s
C.2.4 m/s
D.9.1 m/s
E.4.2 m/s


3.
A relaxed spring protrudes from an opening 0.050 meters as shown in Figure A.
A 1.00-kg block is found to just force the spring completely into the opening as shown in Figure B.
R-1 Ref 10-1

Determine the spring constant k.
A.20.0 N/m
B.196 N/m
C.392 N/m
D.3920 N/m
E.7840 N/m



4.
A relaxed spring protrudes from an opening 0.050 meters as shown in Figure A.
A 1.00-kg block is found to just force the spring completely into the opening as shown in Figure B.
R-1 Ref 10-1

How much potential energy is stored in the spring in Figure B?
A.0.245 J
B.0.490 J
C.4.90 J
D.9.80 J
E.19.6 J



5. A pendulum is transported from sea-level, where the acceleration due to gravity g = 9.80 m/s2, to the bottom of Death Valley. At this location, the period of the pendulum is decreased by 3.00%. What is the value of g in Death Valley?
A.9.22 m/s2
B.9.51 m/s2
C.9.80 m/s2
D.10.1 m/s2
E.10.4 m/s2


6. In a certain clock, a pendulum of length L1 has a period T1 = 0.95 s. The length of the pendulum is adjusted to a new value L2 such that T2 = 1.0 s. What is the ratio L2/L1?
A.0.90
B.0.95
C.1.0
D.1.1
E.1.3


7. What is the period of pendulum consisting of a 6-kg object oscillating on a 4-m string?
A.0.25 s
B.0.50 s
C.1.0 s
D.2.0 s
E.4.0 s


8. A simple pendulum consists of a ball of mass m suspended from the ceiling using a string of length L. The ball is displaced from its equilibrium position by an angle q. What is the magnitude of the restoring force that moves the ball toward its equilibrium position and produces simple harmonic motion?
A.kx
B.mg
C.mg (cos q)
D.mg (sin q)
E.mgL(sin q)


9. An iron ball hangs from a 24-m steel cable and is used in the demolition of a building at a location where the acceleration due to gravity is 9.9 m/s2. The ball is swung outward from its equilibrium position for a distance of 4.5 m. Assuming the system behaves as a simple pendulum, find the maximum speed of the ball during its swing.
A.1.9 m/s
B.7.0 m/s
C.11 m/s
D.2.9 m/s
E.9.8 m/s


10. A simple pendulum on earth has a period of 6.0 s. What is the approximate period of this pendulum on the moon where the acceleration due to gravity is roughly 1/6 that of earth?
A.1.0 s
B.2.4 s
C.6.0 s
D.15 s
E.36 s



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