PS2 CFU Lessons 1 & 2

Your First Name:

Your LAST Name:

Class Period:

• Period 1
• Period 2
• Period 3
• Period 4
• Period 5

In order to investigate the effect of MASS on the amount of kinetic energy: What did you change on purpose (independent variable)?

• The mass of the can
• The shape of the can
• The speed of the can
• How much clay was used

In order to investigate the effect of MASS on the amount of kinetic energy: What did you measure as an outcome (dependent variable)?

• The speed of the can
• The mass of the can
• How high the can was lifted from the table
• Amount of squish/Final thickness of the ball

In order to investigate the effect of MASS on the amount of kinetic energy: What did you keep the same (controlled variables)?

• The speed of the can, The mass of the can
• The mass of the can, Amount of squish
• How high the can was lifted from the table, The speed of the can
• Amount of squish/Final thickness of the ball

When doing an investigation why is it important to only change one variable at a time?

• If you change more than one variable it is challenging to keep track of the changes.
• It is impossible to create a data table that will allow you to record information for more than one variable.
• You will need to add many more steps to your procedure if you change more variables.
• If you change more than one variable, you will not know which one caused the change.

The greater the squish of the clay:

• The greater the amount of kinetic energy in the can.
• The lesser the amount of kinetic energy in the can.
• The amount of squish in the clay did not represent the amount of kinetic energy in the can.

How does MASS affect the amount of kinetic energy of an object?

• Mass does not appear to affect the amount of kinetic energy of an object because the clay was not squished when we dropped the cans.
• The greater the mass of an object the more slowly it moves so the less kinetic energy it will have.
• Objects with more mass have more kinetic energy. I know because the heavy can squished the clay more than the light can.
• Only when we increase the speed of an object can we increase the amount of kinetic energy of an object.

How does SPEED affect the amount of kinetic energy of an object?

• Speed has no effect on the kinetic energy of a moving object.
• When an object moves faster, it has more kinetic energy. When we "threw" the can, the clay was more compacted.
• An increase in speed only made the clay more compacted, it did not affect the amount of kinetic energy of the can.
• We could not measure the speed of the cans so we are unable to measure their kinetic energy. We were only able to observe how much the clay compacted.