Potential and Kinetic Energy
Static Electricity and Magnetism
Speed vs Mass
Mixed
Independent and Dependent Variable
100
Apple A is in on the ground. Apple B is in the tree. Which apple has more potential energy and why?
A. Apple A has more potential energy because it can be thrown
B. Apple B has more potential energy because its high up in an apple tree.
C. Neither one because the apple needs to be moving to have potential energy.
B. Apple B has more potential energy because its high up in an apple tree.
100
Static electricity and Magnetism act in opposite ways.
A. True
B. False
B. False
100
A student is investigating the kinetic energy of a ball that has been thrown. In the first experiment, a ball is thrown at the same speed every time. On each throw the student increases the mass of the ball.
When the ball has a mass of 5g the kinetic energy is 50mj.
When the ball has a mass of 10g the kinetic energy was 100mj.
Choose the correct statement
A. The kinetic energy of the 10 gram ball is half (½×) the kinetic energy of the 5 gram ball.
B. The kinetic energy of the 10 gram ball is two times (2×) the kinetic energy of the 5 gram ball.
C. The kinetic energy of the 10 gram ball is four times (4×) the kinetic energy of the 5 gram ball.
D. The kinetic energy of the 10 gram ball is the same as (=) the kinetic energy of the 5 gram ball.
B. The kinetic energy of the 10 gram ball is two times (2×) the kinetic energy of the 5 gram ball.
100
A skater will have the most kinetic energy at what part of the ramp?
A. Top of the v
B. Bottom of the v
B. Bottom of the v
100
What is a dependent variable?
A. The part of the experiment that never changes
B. The part of the experiment that we change, and are testing
C. The part of the experiment that is the result of something that you changed
C. The part of the experiment that is the result of something that you changed
200
Both apples are falling at the same speed. If Apple A weighs more than Apple B, which apple has more kinetic energy?
A. Apple A has more kinetic energy.
B. Apple B has more kinetic energy.
C. Both Apples have the same amount of kinetic energy.
D. Neither Apple has any kinetic energy.
1. Apple A has more kinetic energy.
200
Which of the following statements about electric and magnetic forces is TRUE?
A. Magnetic forces can be repulsive but electric forces cannot
B. Magnetic and electric forces do not interact
C. Both magnetic ans electric forces can be attractive
D. Electric forces are not affected by distance, but magnetic forces are
C. Both magnetic ans electric forces can be attractive
200
In the second experiment, a ball of the same mass is used every time. On each throw the student increases the speed of the ball.
When the ball is thrown at 10mph the kinetic energy is 100mj
When the ball is thrown at 20mph the kinetic energy is 400mj
Which statement is true?
A. The kinetic energy of the ball thrown at 20 meters per second is half (½×) the kinetic energy of the ball thrown at 10 meters per second.
B. The kinetic energy of the ball thrown at 20 meters per second is two times (2×) the kinetic energy of the ball thrown at 10 meters per second.
C. The kinetic energy of the ball thrown at 20 meters per second is the same as (=) the kinetic energy of the ball thrown at 10 meters per second.
D. The kinetic energy of the ball thrown at 20 meters per second is four times (4×) the kinetic energy of the ball thrown at 10 meters per second.
D. The kinetic energy of the ball thrown at 20 meters per second is four times (4×) the kinetic energy of the ball thrown at 10 meters per second.
200
What is potential energy?
The energy of position
200
What is true about independent variables?
A. They are on the y axis of a graph
B. They are on the x axis of a graph
C. It doesn't matter where it is on the graph as long as its labeled
B. They are on the x axis of a graph
300
If two objects are falling at the same _____________, the one that has more _____________will have _________ kinetic energy.
A. height, mass, less
B. height, speed, more
C. speed, mass, more
D. speed, height, less
C. speed, mass, more
300
Two strong magnets are stuck together. What will happen to the force the magnets exert on each other as I pull them apart?
A. As the magnets are pulled apart, the force exerted decreases
B. As the magnets are pulled apart, the force exerted increases
C. As the magnets are pulled apart, they immediately stop exerting a force
D. As the magnets are pulled apart, no change in force occurs
A. As the magnets are pulled apart, the force exerted decreases
300
If I double the mass then the kinetic energy will
A. Double
B. Stay the same
C. More than double
D. Decrease
A. Double
300
What is kinetic energy?
Energy of motion
300
Experiment: The cakes are baked at 3 temperatures 400 degrees, 450 degrees, and 500 degrees. We record the time it takes for each cake to bake.
What is the dependent variable?
A. Oven temperatures
B. Time it takes the cakes to bake
C. How many cakes we are baking
B. Time it takes the cakes to bake
400
I take an apple and throw it up into an apple tree and it gets stuck. What did I do to the potential energy of the system?
A. Potential energy of the system did not change
B. Potential energy of the system increased
C. Potential energy of the system increased then decreased
D. Potential energy of the system decreased
B. Potential energy of the system increased
400
If two magnets are held in each hand, how can you get both south poles of the magnets to touch?
A. A force must be applied, since the two south poles repel each other
B. A force must be applied, since the two south poles attract each other
C. The magnets will touch without any force being added
D. The magnets can ONLY touch if one of the magnets is reversed so the north pole is facing the south pole
A. A force must be applied, since the two south poles repel each other
400
If I double the speed, then kinetic energy will..
A. Double
B. Stay the same
C. More than double
D. Decrease
C. More than double
400
What are the 4 components of a graph?
1. Labels
2. A title
3. Scales
4. Data
400
Experiment: Students measured the temperature of the water at different depths in Lake Skywalker and found that the temperature varied.
What is the Independent Variable?
A. Skywalker Lake
B. Various depths in Skywalker Lake
C. Temperatures recorded
B. Various depths in Skywalker Lake
500
I take an apple and throw it up into an apple tree and it gets stuck.
Examine the causes listed below. Which best describes the reason for the effect on the energy of the system?
A. The effect on the energy is due to the transfer of energy from the apple to the tree.
B. The effect on the energy is due to the friction on the apple as it is thrown
C. The effect on the energy is due to the changes in kinetic energy as the apple lands in the tree and stops
D. The effect on the energy is due to the force applied to the apple to throw it up into the tree
D. The effect on the energy is due to the force applied to the apple to throw it up into the tree
500
In an experiment to test the construction of electromagnets, the three electromagnets in the diagram were used to lift paperclips. The average number of paperclips each could lift is listed to the right of each diagram. The number of paperclips lifted indicates the strength of the electromagnet (more paper clips = stronger electromagnet).
Magnet 1 has 1 battery and 20 coils of wire
Magnet 2 has 2 batteries and 20 coils of wire
Magnet 3 has 1 battery and 80 coils of wire
Write a hypothesis about how the construction of an electromagnet will effect its strength
My hypothesis is that if the construction of the electromagnet is changed by either adding more coils of wire or adding more batteries that it will increase the strength of the electromagnet.
500
What is true about Linear relationships? (There may be more than one)
A. The Line is curved
B. The line is strait
C. It is used to describe mass and kinetic energy
D. It is used to describe speed and kinetic energy
E. It shows that kinetic energy doubles
F. It shows that kinetic energy more than doubles
G. All of the above are true
H. All of the above are false
B. The line is strait
C. It is used to describe mass and kinetic energy
E. It shows that kinetic energy doubles
500
What is true about non-Linear relationships? (There may be more than one)
A. The Line is curved
B. The line is strait
C. It is used to describe mass and kinetic energy
D. It is used to describe speed and kinetic energy
E. It shows that kinetic energy doubles
F. It shows that kinetic energy more than doubles
G. All of the above are true
H. All of the above are false
A. The Line is curved
D. It is used to describe speed and kinetic energy
F. It shows that kinetic energy more than doubles
500
Four groups of rats are first weighed and then fed identical diets. The amount of vitamin A they receive is changed. Each group gets a different amount. After 3 weeks on the diet, the rats’ weights are measured again and recorded.
What is the independent variable?
A. The amount of rats that were tested
B. The amount of vitamins they were given
C. The rats weight after the experiment
D. The rats diets
B. The amount of vitamins they were given