Two blocks collide on a frictionless surface. After the collision, the blocks stick together. Block A has a mass M and is initially moving to the right at speed v . Block B has a mass 2 M and is initially at rest. System C is composed of both blocks, (a) Draw a force diagram for each block at an instant during the collision, (b) Rank the magnitudes of the horizontal forces in your diagram. Explain your reasoning, (c) Calculate the change in momentum of block A, block B, and system C. (d) Is kinetic energy conserved in this collision? Explain your answer. (This problem is courtesy of Edward F. Redish. For more such problems, visit http://www.physics.umd.edu/perg.)
Two blocks collide on a frictionless surface. After the collision, the blocks stick together. Block A has a mass M and is initially moving to the right at speed v . Block B has a mass 2 M and is initially at rest. System C is composed of both blocks, (a) Draw a force diagram for each block at an instant during the collision, (b) Rank the magnitudes of the horizontal forces in your diagram. Explain your reasoning, (c) Calculate the change in momentum of block A, block B, and system C. (d) Is kinetic energy conserved in this collision? Explain your answer. (This problem is courtesy of Edward F. Redish. For more such problems, visit http://www.physics.umd.edu/perg.)
Solution Summary: The author illustrates the force diagram for each block at an instant during the collision.
Two blocks collide on a frictionless surface. After the collision, the blocks stick together. Block A has a mass M and is initially moving to the right at speed v. Block B has a mass 2M and is initially at rest. System C is composed of both blocks, (a) Draw a force diagram for each block at an instant during the collision, (b) Rank the magnitudes of the horizontal forces in your diagram. Explain your reasoning, (c) Calculate the change in momentum of block A, block B, and system C. (d) Is kinetic energy conserved in this collision? Explain your answer. (This problem is courtesy of Edward F. Redish. For more such problems, visit http://www.physics.umd.edu/perg.)
A certain brand of freezer is advertised to use 730 kW h of energy per year.
Part A
Assuming the freezer operates for 5 hours each day, how much power does it require while operating?
Express your answer in watts.
ΜΕ ΑΣΦ
?
P
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Part B
W
If the freezer keeps its interior at a temperature of -6.0° C in a 20.0° C room, what is its theoretical maximum
performance coefficient?
Enter your answer numerically.
K =
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Part C
What is the theoretical maximum amount of ice this freezer could make in an hour, starting with water at 20.0°C?
Express your answer in kilograms.
m =
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kg
Describe the development of rational choice theory in sociology.
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