CC8n2 Practice Problems

 New Problems reloads the page with new variable values in all questions. You must do this after grading the test to rework it another time. Make sure to enter your answers in the specified units .
 1
A boy whose mass is 70 kilograms rides up in an elevator. If he gets off the elevator meters above where he entered, how much work did the elevator machinery do on him?

 2
A kilogram mass is dropped from the roof of the physics lab. Assuming the roof is meters above the ground, how much kinetic energy will it have when it hits the ground?

 3
If I were to throw a ball vertically upward, how fast would it have to be going in order to touch the ceiling which is meters above the level at which I release the ball? Give your answer in m/s.

 4
A pendulum is moving at m/s at the lowest point of its arc. How high above that point will it be at the end of its arc?

 5
Could Alex Kapp kick a ball fast enough for it to hit the lab ceiling? (1=Yes 2=No)

Once you have submitted your answers for grading by clicking the grade button, you cannot resubmit answers for the same Problem Set--you must use the 'New Problems' button first.
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