Intro to Forces
What is the force that causes objects to slow down?
Friction
When arrows point in the opposite directions what do I do to calculate net force?
Subtract
What is Newton's 3rd Law?
For every action, there is an equal and opposite reaction.
Where is kinetic energy lowest on a roller coaster?
At the top of the highest hill.
What is the Law of Conservation of energy?
Energy cannot be created nor destroyed, only transferred or transformed.
What will have more friction? Tile or carpet?
Carpet
When arrows point in the same direction, how to do I calculate net force?
Addition
If I hit a nail with a hammer, what is the force pairs?
Hammer pushing down on the nail, nail pushes back up on the hammer with an equal amount of force.
Name 2 examples of kinetic energy.
Answers will vary.
Letting go of a rubber band after being stretched.
Riding an electric scooter.
What is the transfer of energy in a flashlight?
Chemical (batteries) --> electrical (wires) --> radiant/light (bulb)
What will the South and North pole on a magnet do when put together? What will the North and North pole on a magnet do when put together?
repel
I have an object that has 20N to the right. It has another arrow with 30N to the right. What is the net force and direction?
50N to the right
A student kicks a soccer ball at a stationary soccer ball. What is true about the force pair?
Both the moving soccer ball and stationary soccer ball exert and equal force and opposite direction on each other.
What kind of energy is stored in food?
Chemical
What are transverse waves and how do they move?
Transverse are like electromagnetic, light, and water. They move perpendicular through space. (Do not need a medium).
Does friction work with moving objects or against?
Against
When something is still is it balanced or unbalanced?
When something is accelerating/not moving at a constant speed, is it balanced or unbalanced?
Balanced
Unbalanced
If an arrow is pointing to the right, what direction should the other arrow point according to Newton's Third Law?
Left
I am holding a bouncy ball in the air. What kind of energy is this an example of?
gravitational potential
What are longitudnial waves and how do they move?
Longitudinal waves are sound waves. They move parallel through a medium.
Friction
A student is pushing a table with 137N of force to the left. Another student is pushing in the opposite direction with a force of 98N. What is the net force and direction?
39N to the left
A bus runs into a wall. What is true about the force pair?
Both the bus and the wall exert an equal force in opposite directions causing the bus to stop.
I have baking soda and what to make it react with vinegar. What kind of energy is this an example of?
Chemical potential
What is compression and rarefaction?
Compression is where the wavelengths become shorter and closer together. Rarefaction is when the wavelengths become longer and more separated.