Test - Energy Flashcards
2 When an object is dropped what happens to potential and kinetic energy as it falls?
GPE goes down, KE goes up
3 What energy change do the appliances to the right all have in common?
They convert electrical energy to thermal energy
5 What is the potential energy of a 55 kg box that is sitting 8.0 m above the ground?
4,312 J
6 The gravitational energy of an object increases as its ______ increases.
height and mass
8 Green plants convert light energy from the sun into ____ during photosynthesis.
chemical potential energy
9 Where would this roller coaster have the greatest kinetic energy?
the lowest point
10 A medicine ball has 10 J of energy and is thrown upward with a velocity of 2 m/s. What is its mass
5 kg
11 Energy stored in food would be considered.
chemical potential
12 Which of the following is not a type of potential energy?
kinetic
13 This roller coaster car starts from rest and moves along the track. At what point does the roller coaster car have the greatest potential energy?
at the highest point
15 When an object (like a ball) falls, some of its ______ energy changes to _______ energy, due to the law of conservation of energy.
potential, kinetic
16 Two trucks have the same velocity but different masses. Truck #1 has a mass of 200 kg and Truck #2 has a mass of 500 kg. Truck # ______ has the most kinetic energy.
2
17 Energy Transformations: A toaster would be an example of
electrical to thermal
18 The kinetic energy of an object increases as its ______ increases.
velocity
21 The picture below shows a person swinging a baseball bat, starting at point A. The gravitational potential energy of the bat would be the greatest at
at the start
