Variables and Metric Units
What was the dependent variable in the helmet experiment?
If the egg broke or not.
Calculate the average test scores: 20, 24, 76, 32
38
What is Kinetic Energy?
Moving energy
True or False: Newton's 1st Law of Motion states that for every action, there is an equal and opposite reaction.
False
True or false: Newton's 3rd Law of Motion states that Force = mass x acceleration.
False
What was the independent variable in the helmet experiment?
The style of the helmet (helmet design)
What is the formula for speed?
Speed = distance / time
What is Potential Energy?
Stored energy
What is another name for Newton's 1st Law?
The Law of Inertia
What is Newton's 3rd Law of Motion?
For every action, there is an equal and opposite reaction.
What is the metric unit for Mass?
Gram
Calculate the average Mass: 17 g, 24 g, 53.2 g, 87.8 g, 2.1 g
36.82 grams
How can you increase Potential Energy? The formula is PE = Mass x gravity x height.
Raise the height the object is dropped from, or increase the object's mass.
What is Newton's First Law of Motion?
An object at rest will remain at rest, and an object in motion will remain in motion unless acted on by an unbalanced force.
Hitting your head against something else.
What is the metric unit for Weight?
Newton (N)
Calculate the speed of a motorcycle that moves 40 meters in 7 seconds. Round to the nearest whole numbers, and include units
About 6 meters per second.
How can you increase Kinetic Energy? The formula is: 1/2(mass) x (velocity)2
Increase the Mass or Velocity.
Inertia
What is a reaction that causes brain injuries?
Your brain bleeds after it has been hit.
What is the metric unit for Distance?
meter
Calculate the speed of a skateboard that travels 23 meters in 5 seconds. Include the entire number and units.
4.6 meters per second.
What is the relationship between Kinetic and Potential Energy?
As Kinetic Energy increases, Potential Energy decreases.
Using the Helmet Experiment, provide an example for Newton's 1st Law of Motion.
2. The Helmet fell until it hit the floor.
Name an action-reaction pair from the Helmet Experiment.
Action: Letting the helmet go, Reaction: Helmet falls.
Action: Helmet falls, Reaction: Helmet hits the floor.
Action: Helmet hits the floor, Reaction: Egg is moved.