1. What is mechanical energy? What are the two primary types of mechanical energy you may have?

 

  1. What is kinetic energy?What are the two main types of kinetic energy and how are they different?

 

  1. What is potential energy?What are the three main types of potential energy and how are they different?

 

  1. What are the units for work, energy, and power?

 

  1. What does conservation of energy mean? Is this never true, sometimes true, or always true?

 

  1. How does the work of lifting a 5 kg rock up two stories compare to the work of lifting a 5 kg rock up only one story?

 

  1. What quantity changes when work is done?(ie: force, momentum, power, energy, acceleration, etc…)

 

  1. If an arrow has 40 J of Elastic Potential Energy when it’s about to be fired, then how much KE would it have after being fired? (More than 40 J, Less than 40 J, or exactly 40 J)

 

  1. A rock is dropped off a bridge; it begins with 400 J of GPE and 0 J of KE. Just before it hits the ground, how much KE must it then have?

 

  1. Which is more work: lifting a 4 kg mass up 10 m or lifting a 2 kg mass up 20 m? Why?

 

  1. A baseball and a bowling ball happen to have the same KE at a certain moment: which one must be moving faster, or would they be moving at the same speed? Why?

 

  1. If an object is not moving, what types of energies can it have? Which types can it not have?

 

  1. How much Power is it when you lift up a 500 N box, 4 meters high, in 3 seconds?

 

  1. How much work is it when you lift up a 50 kg box, 2.2 meters high?

 

  1. What would be the GPE of a person (70 kg) at the top of a rollercoaster (80 meters high)?

 

  1. A mystery box has 250 J of GPE, and is 15 meters high; how much mass must it have?

 

  1. What would be the KE of a 5 kg toy car, traveling at 2 m/s?

 

  1. If a baseball has a mass of 0.15 kg and 68 J of KE, how fast must it be going?

 

  1. A strongman carries a 600 N boulder forward, 18 meters; how much work is done? Why?

 

  1. A basketball has a mass of 0.65 kg; how much total energy would it have as its traveling at 1.5 m/s and is also 4 meters high? Hint: Find GPE and KE separately first.

 

  1. A second later the basketball from the above problem is now lower in the air; now it’s 3 meters high instead. (a) How much GPE would it have? (b) How much total energy would it have? (c) How much KE would it have?

 

  1. A rollercoaster begins at a hill 20 meters in the air, with a mass of 100 kg.It also begins not moving.  How much total energy does it have?

 

  1. A while later, the rollercoaster from the above question, is at a height of 10 meters.(a) How much GPE should it have?  (b) How much total energy should it have?  (c) How much KE should it have at that moment?

 

  1. A while later still, the rollercoaster from the above questions, is at a height of 7.8 meters.How much KE should it have at that moment?

 

  1. A bulldozer pushes a car out off a set of train tracks for 6 seconds. The car has a mass of 900 kg and accelerates at a rate of 2.5 m/s/s.The distance traveled is 45 meters. How much Power did the bulldozer exert?

 

  1. What is renewable energy? What are the different types of renewable energy?

 

  1. Why is renewable energy advantageous?

 

  1. How come a Newton’s cradle will eventually stop, even though total energy should be conserved?