Vocab 1
A contact force caused by rubbing
Friction
Speed with direction
Velocity
A rocket launches because exhaust gases push downward, and the rocket moves upward. This is an example of which law?
Newton's Third Law
Velocity is like Speed, but it also requires a __________.
Direction
A runner travels 200 m in 40 s. What is her speed?
5 m/s
The unit used to measure force
Newtons
Distance traveled per unit of time
Speed
Which law is known as the Law of Inertia?
Newton's First Law
A car drives 300 km in 5 hours. What is the car’s speed?
60 km/hr
A car drives 30 km east in 3 hours. What is the car’s velocity?
10 km east
Pushing or pulling an object
Force
Your speed at that exact moment
Instantaneous Speed
A train moves faster when the engine pulls with more power. This is an example of which law?
Newton's Second Law
A runner moves at 4 m/s for 20 s. What is the distance traveled?
80 meters
A runner moves 400 m west, then 100 m east in 50 seconds. What is their velocity?
60 m west
Combination of all forces acting on an object
Net Force
A position used for comparison to anther object
Reference Point
Write the equation for Newton’s 2nd Law.
F = M x A
A rocket travels 900 m at 300 m/s. How much time does the trip take?
3 seconds
A roller coaster goes from 0 m/s to 30 m/s in 6 s. What is its acceleration?
5 m/s2
The rate at which velocity changes
Acceleration
Two equal and opposite forces; result = 0
Balanced Force
Write the equation for Speed. (In words)
Speed = Distance / Time
A box with mass 10 kg is pushed with an acceleration of 2 m/s². What is the force?
F = M x A 20 Newtons
-5 m/s2