Motion
What do we call a change in position compared to a place or an object that is not moving?
Motion
What is the formula for speed?
What is a force?
A push or pull on an object
What is gravity?
Invisible force that pulls objects together (or towards Earth).
On a distancec-time graph, which axis usually shows time
Horizontal (X)
What two quantities are used to describe an object in motion?
Speed and Velocity
A marble travels 60 feet in 5 seconds. How fast was the marble moving?
12 feet per second
Name two things a force can cause an object to do.
What type of force is gravity?
Non-contact
Vertical (Y) axis
If an object does not change its position over time, how would you describe its motion?
The object is at rest.
Angela throws a ball 120 feet in 20 seconds. What is the ball's speed?
6 feet per second
What is friction? When does it occur?
Friction is a contact force that happens when two surfaces touch and move or try to move past each other
State Newton's First Law of Motion and give one example.
An object in motion will remain in motion unless acted upon by an unbalanced force. An object at rest will remain at rest unless acted upon by an unbalanced force.
If a distance-time graph has a horizontal line, what does that tell you about the object's motion?
It is at rest
Give an example of velocity.
Answers may vary
Explain the difference between speed and velocity. Use an example
Speed- how fast an object is moving
Velocity- Speed and direction of an object
If a refrigerator will not move, what are two ways a person could make it move easier?
Answers may vary
Every action has an equal and opposite reaction.
Describe what the steepness of a line tells us about an objects motion.
The steeper the line, the faster the object is moving.
Define acceleration
A change in speed or direction.
Derrick drives 10 miles in 5 minutes. What is his speed in miles per minute? What is his speed in miles per hour? (Hint: 60 minutes = 1 hour).
2 miles per minute, 120 miles per hour
Explain how increasing the mass of an object affects the force needed to change its motion. Bonus points if you can say which Law of Motion this applies to
Explain why two objects with the same mass may fall towards Earth at different rates?
A toy car moves at a steady speed for 3 seconds, stops for 2 seconds, moves faster for 4 seconds, then turns around to go towards its starting point. Describe how each part would look on a distance-time graph.