Graded Energy Problems

Open Note Energy Take Home Quiz
You may use your notes, but you may not work with anyone else to complete the following questions about energy. Remember: kg, m and s.

1) Jeff’s potato launcher (which stands at 75cm off of the ground) hurls a 10 kilogram projectile straight up it the air. When it leaves the ground, it has a speed of 15 m/s. Assume zero air resistance, and thus perfect conservation of energy.
a) What is it KE when it leaves the ground?
b) What is the potato’s PE when it leaves the ground?
c) What is the potato’s Total/mechanical energy when it leaves the ground?
d) When the potato is at its maximum height, its speed it 0. What is its KE?
e) When the potato is at its maximum height, what is its PE?
f) Using the PE of the potato at its maximum height, what is its maximum height?

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