Concept explainers
(a)
The work to push the crate horizontally across factory floor.
Answer to Problem 2TS
The work to push the crate horizontally across the factory floor is
Explanation of Solution
Given info: The force to push the crate is
Write the expression to calculate the work to push the crate.
Here,
Substitute
Conclusion:
Therefore, the work to push the crate horizontally across the factory floor is
(b)
The kinetic energy gained by the crate.
Answer to Problem 2TS
The kinetic energy gained by the crate is
Explanation of Solution
Given info: The force of friction on the crate is
From the Work-Energy theorem, the gain of the kinetic energy of the crate is equal to work done by the crate against the friction.
Write the expression to calculate the kinetic energy gained by the crate.
Here,
Substitute
Conclusion:
Therefore, the kinetic energy gained by the crate is
(c)
The work that converts into heat.
Answer to Problem 2TS
The amount of work that converts into heat is
Explanation of Solution
Write the expression to calculate the work that converts into heat.
Here,
Substitute
Conclusion:
Therefore, the amount of work converts into heat is
Chapter 6 Solutions
Conceptual Physical Science Explorations
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