While going to drop a penny out of the window of a tall building you accidentally dropped a cell phone too. When you get to the ground you find the penny appears unaffected while the cell phone is completely smashed (metal case and all). Which of the following explains why this happened?
The cellphone had a much smaller mass than the penny so it had more kinetic energy when it hit the ground.
The cellphone had a much larger mass than the penny so it had more kinetic energy when it hit the ground.
The cellphone was traveling much slower than the penny so it had more kinetic energy when it hit the ground.
The cellphone was traveling much faster than the penny so it had more kinetic energy when it hit the ground.
Refer to figure B. Consider the data points labeled C, F, and E. Which point represents the scenario of a coin that would cause the most damage and how do you know?
F, because the mass and speed are the highest which makes the kinetic energy the highest.
F, because the speed is the highest and since speed is the only factor that affects kinetic energy it would make kinetic energy high.
C, because it is the highest speed since speed has the biggest effect on kinetic energy it would make kinetic energy high.
E, because the mass is the highest, since mass has the biggest effect on kinetic energy it would make kinetic energy high.
Refer to figure A and C. As the speed of the penny _____________, the kinetic energy _____________.
increases, increases
increases, decreases
stays the same, increases
increases, stays the same
there is no relationship
Refer to figure B. What type of relationship exists between mass and kinetic energy?
There is no relationship between mass and kinetic energy.
There is a proportional relationship between mass and kinetic energy (as one increases, so does the other)
The relationship between mass and kinetic energy depends on the value for speed.
There is an inversely proportional relationship between mass and kinetic energy (as one increases, the other decreases)
Refer to figure B and C. How can the graphs be interpreted to determine which variable has a larger effect on kinetic energy?
The flat line for mass means that changes in mass will always increase the kinetic energy.
The curve of the line for speed means that the changes in kinetic energy are not predictable.
The line gets more steep as mass increases which means changing the mass has a larger impact on kinetic energy.
The line gets more steep as speed increases which means changing the speed has a larger impact on kinetic energy.
