Lab: Kinetic Energy

Question 1

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. In Part I, the independent variable was . In Part II, the independent variable changed to . The dependent variable for both Part I and Part II was .

Revolt · Accepted Answer

D: mass

Question 2

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 3

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 4

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. A 1,000 kg ball traveling at 5 m/s would have kinetic energy. A 10 kg ball traveling at 5 m/s would have kinetic energy. A 100 kg person falling at 5 m/s would have kinetic energy.

Revolt · Accepted Answer

B: 10 times more

Question 5

Read through the scenarios below and calculate the predicted change in kinetic energy of the object compared to a50 kg ball traveling at 10 m/s. A 50 kg ball traveling at 20 m/s would have kinetic energy. A 50 kg ball traveling at 5 m/s would have kinetic energy. A 50 kg person falling at 10 m/s would have kinetic energy.

Revolt · Accepted Answer

Selection 1: 4 times more; Selection 2: 4 times less; Selection 3: the same

Question 6

Question 6

Revolt · Accepted Answer

A

Question 7

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 8

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 9

If you repeated this experiment, which options could lead to more precise results? Check all that apply.

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 10

Question 10

Revolt · Accepted Answer

C: speed

Lab: Kinetic Energy Answers

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