Lab: Kinetic Energy

Question 1

Which is the correct equation for calculating the kinetic energy of an object?

Revolt · Accepted Answer

B: [Image: K times E = one half m v squared....]

Question 2

The concept of energy can be calculated in multiple ways. Which units are used for energy? Check all that apply.jouleskilogram meters2/seconds2newtonskilojoulesmeters/seconds2

Revolt · Accepted Answer

A: joules; B: kilogram meters2/seconds2; D: kilojoules

Question 3

Which graph best represents the relationship between KE and mass?

Revolt · Accepted Answer

A: [Image: A graph with vertical axis K E and horizontal axis...]

Question 4

Which graph best represents the relationship between KE and speed?

Revolt · Accepted Answer

B: [Image: A graph with vertical axis K E and horizontal axis...]

Question 5

Which factors could be potential sources of error in the experiment? Check all that apply.energy lost in the lever due to frictioncolor of the soda bottle used in the experimentvisual estimation of height of the beanbagtemperature of the lab at the time of the experimentposition of the fulcrum for the lever affecting transfer of energy

Revolt · Accepted Answer

A: energy lost in the lever due to friction; C: visual estimation of height of the beanbag; E: position of the fulcrum for the lever affecting transfer of energy

Question 6

If you repeated this experiment, which options could lead to more precise results? Check all that apply.Increase the drop heights from the top of a building, using the same lever.Use a video camera to record the height of each beanbag with greater accuracy.Use a pressure sensor to record the force of the soda bottle more accurately.Increase the number of trials for each experiment by a factor of three.Increase efficiency by examining mass and speed at the same time in the same trial.Throw the bottle at the lever as hard as you can, instead of dropping it, to create maximum KE.

Revolt · Accepted Answer

B: Use a video camera to record the height of each beanbag with greater accuracy.; C: Use a pressure sensor to record the force of the soda bottle more accurately.; D: Increase the number of trials for each experiment by a factor of three.

Question 7

Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down menus to complete the statements.

Revolt · Accepted Answer

D: ✔ mass

Question 8

timekinetic energy✔ speedmass

Revolt · Accepted Answer

C: ✔ speed

Question 9

time✔ kinetic energyspeedmass

Revolt · Accepted Answer

B: ✔ kinetic energy

Question 10

Read through the scenarios below and calculate the predicted change in kinetic energy of the object compared to a 100 kg ball traveling at 5 m/s.

Revolt · Accepted Answer

B: ✔ 10 times more

Lab: Kinetic Energy Answers

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