Force
What is force?
A push or pull on an object that may or may not cause motion, has size and direction.
What is velocity?
The speed of an object in a particular direction.
What is acceleration?
The rate at which velocity changes over time, an object accelerates if its speed, direction, or both change.
What is motion?
The act or process of moving or being moved.
Define Newton’s First Law of Motion
An object will remain at rest or in uniform motion in a straight line unless acted on by an external force.
Define net force
The combination of all forces acting on an object.
Acceleration is the measure of the change in what?
Velocity
What is an example of acceleration?
A boulder rolling down a hill faster.
As time increases, does the velocity of an object increase or decrease?
Increase
Define Newton’s Second Law
Force=Mass x Acceleration
What is the SI unit of force?
Newton
A car moves 80km south. What is it’s displacement?
80km south
What is negative acceleration?
Deceleration
What is the meaning of the slope on a distance vs time graph?
Speed
Define Newton’s Third Law of Motion
For every action, there is an equal and opposite reaction.
F=MA, What does M represent?
Mass
A car moved 60km east and 90km west. What is the total distance moved?
150km
What slows down an object in acceleration?
Friction
How do you know if an object is moving?
Compare it to a reference point.
Which object has more inertia: tennis ball or refrigerator?
Refrigerator
What is the net force on a 200g ball when it hits a wall with an acceleration of 10m/s2?
2 Newtons
What is the average velocity of a car that moved 60km in 3 hours?
20km/h
A car is going 60mph and accelerating at 10mph. How far does it go in an hour?
65 miles
What is the formula for speed?
Distance/Time
A box is pushed to the right wth a 10N force and to the left with a 2N force. Which direction is the net force?
Net force of 8N to the right.