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Energy II

coronaipc energy II

QuestionAnswer
Why must the first hill of a roller coaster be the tallest? When the potential energy stored at the top of the hill is transformed into kinetic energy, some is transformed into heat due to friction, and cannot be transformed back into potential energy.
A paper clip and a ball are sitting on a shelf 2 meters from the ground. Which one has more potential energy? The ball has more potential energy.
What effect does the horizontal position of an object have on its potential energy? It has no effect.
If the height of an object is doubled, what happens to its potential energy? The potential energy doubles.
What is the potential energy of a 3 kg ball that is on the ground? Zero
A 2 kg rock is lifted at a speed of 2 m/s and a 1 kg rock is lifted at a speed of 3 m/s. Which one has more kinetic energy when it is being lifted? The 1kg rock.
What is the kinetic energy of a 3000kg boat moving at 2 m/s? 6000 joules
What is the potential energy of a 2 kg book sitting on a 3 meter high shelf? 54.8 joules
A 500 N boy is on top of a hill. His potential energy is 1000 joules. What is the height of the hill? 2 meters
A 2 kg ball is thrown into the air with an initial velocity of 40 m/s. How much kinetic energy does it have? 1600 joules
What is the mass of a car that creates 25,000 joules of energy by traveling at 5 m/s? 2000 kg
Created by: coronaipc
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