Download Practice for Gravitational and Hooke`s laws

Section 4.4 and 4.5 Practice
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Explain what happens to the force of gravity between two objects as the objects get further apart.
Explain what happens to the force of gravity between two objects as the objects get closer together.
Sketch a graph showing the relationship between the mass of an object and force of gravity on the object by
the earth.
Sketch a graph showing the relationship between the distance of an object from the earth’s center and force
of gravity on the object by the earth.
Explain what happens to the force of gravity between two objects if one of the object’s mass increases
Explain what happens to the force of gravity between two objects if one of the object’s mass decreases.
Two objects, m1 and m2, experience a force of gravitational attraction between them. What would happen to
the force between them if the distance is tripled?
Two objects, m1 and m2, experience a force of gravitational attraction between them. If m1 is tripled and m2 is
doubled, what would happen to the force between them?
Two objects, m1 and m2, experience a force of gravitational attraction of 12 N. If m1 is doubled and the
distance between them is cut in half, what would be the force between them?
Describe the earth’s gravitational field.
Clearly distinguish between mass and weight.
Determine the weight on Jupiter’s moon Io, of a person that has 70.0 kg of mass given that Io has a mass of
8.93x1022 kg, a radius of 1.82x106km and a surface area of 4.2x107km2.
Determine the mass of an object that weights 4700N when is floating 6.4x106m above the center of the
Earth, given that the mass of the Earth is 5.97x1024 kg.
What is Hooke’s Law, and why is the significance of the negative sign in Hooke’s Law?
A spring stretches 20.0 cm when a 234 g is attached to the spring. Calculate the spring constant of this
spring.
How far would a mass of 500.0 kg stretch a spring that has a spring constant of 28 N/m?
The data in Figure 1 was collected in class. Use the data to determine the spring constant of the spring used.
mass
(kg)
0
0.10
0.20
0.30
0.40
0.50
Figure 1,m
distance
stretched
(m)
Weight(N)
0
0
0.070
1.0
0.130
2.0
0.193
2.9
0.261
3.9
0.327
4.9
After you have graphed the data, interpolate to find the weight for a distance of 0.22m, and extrapolate to
find the weight for a distance of 0.5m.
19. Based on the previous question, describe the differences and similarities between interpolation and
extrapolation
20. Explain using the ideas of Hooke’s Law and Gravitation how a simple bathroom scale works.
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