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Regents Physics
Worksheet 3.2.4 – Work Done by Friction (10 points)
Show all work – multiple choice answers MUST be proven for full credit!
10
1. A student pulls a box 5.0 meters across a horizontal surface
at a constant speed of 4.0 meters per second using a force
of 60 newtons.
a. Calculate the amount of work done by the
student.
[300 J]
b. What type of energy is being produced by the
work done by the student?
3. A 0.10 newton spring toy with a spring constant of 160
newtons per meter is compressed 0.05 meter before it is
launched. When released the spring toy pops up and
reaches a maximum height of 1.5 meters.
a. How much elastic potential energy is initially
stored in the spring?
[0.2 J]
b. How much internal energy is produced as the
