Position and Motion
What is the starting point used to describe an object's position?
Reference point
What is the equation for average speed?
Speed = distance ÷ time
What is a force?
A push or a pull
Which Newton's Law says that an object at rest stays at rest unless acted on by an unbalanced force?
Newton's First Law
What force attracts objects with mass toward one another?
Gravity
What two things are used to describe an object's location?
Distance and direction
What two things make up velocity?
Speed and direction
What force opposes motion between two touching surfaces?
Friction
Which Newton's Law is represented by F = ma?
Newton's Second Law
The amount of matter in an object
Mass
The process of changing position
Motion
What happens when an object's velocity changes?
The object is accelerating.
The sum of all the forces acting on an object
Net Force
What does Newton's Third Law state about forces?
For every force, there is an equal and opposite force.
What is the acceleration due to gravity near Earth's surface?
9.8 m/s²
What is it called when you get the shortest straight line from 1 position to another?
Displacement
A car travels 120 km in 2 hours. What is its average speed?
60 km/h
Two students pull a rope in opposite directions. One pulls with 50 N and the other pulls with 50 N. What is the net force?
0 N
A swimmer pushes water backward with their arms. What happens to the swimmer?
The water pushes the swimmer forward.
Why does a feather and a bowling ball fall at the same rate in a vacuum?
No air Resistance
A student walks 10 m east and then 10 m west back to where they started. What is their total distance and displacement?
Distance = 20 m; displacement = 0 m
A runner travels 100 m in 10 seconds, then travels 200 m in 20 seconds. What is the runner's average speed for the entire trip?
10 m/s
A 10 kg object experiences a net force of 50 N. Using F = ma, what is its acceleration?
5 m/s²
A rocket pushes gases downward. According to Newton's Third Law, why does the rocket move upward?
Rocket Upward
An object has a mass of 10 kg. What is its weight near Earth's surface? Use W = mg.
98 N