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Na Section Dite 20 LABORATORY 20 Simple Harmonic Motion—Mass on a Spring PRE-LABORATORY ASSIGNMENT 1. Describe in words and give an equation for the kind of force that produces simple harmonic motion. 2. Other than the type of force that produces it, what characterizes simple harmonic motion? 3. A spring has a spring constant k = 8.75 N/m. If the spring is displaced 0.150 m from its equilibrium position, what is the force that the spring exerts? Show your work. 4. A spring of constant k=11.75 N/m is hung vertically. A 0.500 kg mass is suspended from the spring. What is the displacement of the end of the spring due to the weight of the 0.500 kg mass? Show your work. COPYRIGHT © 2008 Thomson Brooks/Cole 211 212 Physics Laboratory Man Loyd 5. A spring with a mass on the end of it hangs in equilibrium a distance of 0.4200 m above the floor. The mass is pulled down a distance 0.0600m below the original position, released, and allowed to oscillate. How high above the floor is the mass at the highest point in its oscillation? Show your work. 6. A massless spring has a spring constant of k=7.85 N/m. A mass M=0.425 kg is placed on the spring and it is allowed to oscillate. What is the period T of oscillation? Show your work. Nam Section Date 18 LABORATORY 18 Archimedes' Principle PRE LABORATORY ASSIGNMENT 1. What is the definition of density? What are its units? 2. What is specific gravity? What are its units? 3. State Archimedes' principle. 4. The buoyant force on an object placed in a liquid is (a) always equal to the volume of the liquid displaced (b) always equal to the weight of the object (c) always equal to the weight of the liquid displaced (d) always less than the volume of the liquid displaced. COPYRIGHT 2008 Thomson Brooks/Cole 5. An object that sinks in water displaces a volume of water (a) equal to the object's weight (b) equal to the object's volume (c) less than the object's volume (d) greater than the object's weight. 193 194 Physics Laboratory Manwa Loyd 6. An object that sinks in water has a mass in air of 0.0675 kg. Its apparent mass when submerged in water, as in Figure 18-1, is 0.0424 kg. What is the specific gravity SG of the object? Considering the densities given in Appendix II, of what material is the object probably made? Show your work. 7. A piece of wood that floats on water has mass of 0.0175 kg. A lead weight is tied to the wood, and yod in air and the lead woich with the 07651 COPYRIGH 211 212 Physics Laboratory Manwl Loyd 5. A spring with a mass on the end of it hangs in equilibrium a distance of 0.4200 m above the floor. The mass is pulled down a distance 0.0600 m below the original position, released, and allowed to oscillate. How high above the floor is the mass at the highest point in its oscillation? Show your work. 6. A massless spring has a spring constant of k=7.85 N/m. A mass M=0.425 kg is placed on the spring and it is allowed to oscillate. What is the period T of oscillation? Show your work. 7. A massless spring of k=6.45 N/m has a mass M=0.300 kg on the end of the spring. The mass is pulled down 0.0500 m and released. What is the period T of the oscillation? What is the period T if the mass is pulled down 0.1000 m and released? State clearly the reasoning for your answer. Name Section Date Lab Parts 193 194 Physics Laboratory Manu Loyd 6. An object that sinks in water has a mass in air of 0.0675 kg. Its apparent mass when submerged in water, as in Figure 18-1, is 0.0424kg. What is the specific gravity SG of the object? Considering the densities given in Appendix II, of what material is the object probably made? Show your work. 7. A piece of wood that floats on water has a mass of 0.0175 kg. A lead weight is tied to the wood, and the apparent mass with the wood in air and the lead weight submerged in water is 0.0765 kg. The apparent mass with both the wood and the lead weight both submerged in water is 0.0452 kg. What is the specific gravity of the wood? Show your work. 8. An object has a mass in air of 0.0832 kg, apparent mass in water of 0.0673 kg, and apparent mass in another liquid of 0.0718 kg. What is the specific gravity of the other liquid? Show your work. Nam Section Dure Lab Part
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LABORATORY 20 - Mass on a spring, Simple Harmonic
Motion
Pre laboratory assignment
1. Describe in words and give an equation for the kind of force that produces simple harmonic
motion.
F

=

-ky (Hooke’s law )

k
y

=
=

spring Constant
Displacement

𝝎

=

𝝎
M

=
=

Angular velocity
Mass place on a spring

T

=

2𝛑 √

T

=

Period



𝐤
𝐌

𝐌
𝐤

2. Other than the type of force that produces it, what characterizes simple harmonic motion?
In simple harmonic motion force always toward the equilibrium point and force
proportional to the displacement.
3. A spring has a spring constant k=8.75 N/m. If the spring is displaced 0.150 m from its equilibrium position,
what is the force that the spring exerts? Show your work.

According to the hooke’s law,
F
=
F
=
F
=

-ky
8.75 × 0.150
1.31 N

4. A spring of constant k=11.75 N/m is hung vertically. A 0.500 kg mass is suspended from
the spring. What is the displacement of the end of the spring due to the weight of the 0.500
kg mass? Show your work.
According to the h...


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