# Energy Problems Assignment ```Physics Assignment ‐ ENERGY PROBLEMS
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Word Problems
Answer all word problems on a separate sheet of paper.
Breakdown of points:
1 point for showing knowns/unknowns (and showing correct conversions if necessary)
1 point for showing proper equation/formula
1 point for using the equation/formula correctly (process)
1 point for calculating correct answer and showing correct unit
(Example: A word problem that requires the use of only one step, or one equation/formula, will be graded as shown above, and will
be graded out of four possible points. A two‐step problem will be graded out of seven possible points ‐ SO SHOW ALL YOUR STEPS!)
[use equations/formulae from your notes ‐ remember that g = 9.8 m/s2]
1. A 65 kg student climbs a 40.0 m flight of stairs in 15.0 s. Calculate the gravitational potential
energy at the top of the stairs. (HINT: 1 step problem ‐ use only one equation!) [4 points]
2. A go‐cart derby is about to start and Marisa pushes her 15.0 kg cart to the start line 10.0 m up the
hill. Calculate the work done by Marisa on the go‐cart over the 10.0 m if friction is ignored. (HINT:
1 or 2 step problem ‐ use one or two equations to get to the answer!) [7 points]
3. A large electromagnet is lifting a 2000 kg minivan by doing 30000 J of work. How high is the
minivan being lifted? (HINT: 1 or 2 step problem ‐ use one or two equations to get to the