Describing Motion and Force
True or false: If you're in a car with your friend and your speedometer says you are moving at 70 mph, your friend is moving 70 mph from your frame of reference.
False
What is the SI unit for acceleration?
Meters/Second2 or Meters/Second/Second
Which of Newton's Laws of Motion has to do with inertia?
Newton's First Law of Motion
True or false: As mass increases and distance decreases, gravity has a greater affect.
True
Two cars pass each other going in opposite directions. They are in a school zone. The first car is going 20 MPH and the second car is going 80 MPH. From the first car's frame of reference, how fast is the second car going?
100 MPH
What is acceleration?
A change in speed or direction
Which of Newton's Laws of Motion has to do with action-reaction pairs?
Newton's Third Law of Motion
When would static friction affect a laptop?
When the laptop is sitting still on top of a desk.
A 40-year-old man is pulling a lollipop from a baby with a force of 10N and the baby is pulling it away with a force of 3N. What is the strength of the net force on the lollipop?
7 Newtons
A baseball goes 100 feet in 15 seconds. What is it's speed in feet per minute?
400 feet per minute
Which of Newton's Laws of Motion has to do with the formula Force = Mass * Acceleration?
Newton's Second Law of Motion
What are the two ways that you can affect friction?
You can change the force at which the objects are being pushed together and you can change the type of surface each object has.
A bike runs over a ball, and the ball is pushed into the ground. What two terms can be used to describe the force that acted on the ball?
Contact and unbalanced.
14 MPH
What is inertia?
An object's resistance to a change in motion
What are the the four types of friction?
Sliding, rolling, fluid, and static friction