Movin' Right Along
When an object is not moving, physicists say it is ____________.
What is "at rest".
When you push a book across a table, you are providing this force.
What is applied.
What is the formula for acceleration?
Acceleration = Final Velocity - Initial Velocity / change in time
The term used to describe the overall force acting on an object.
What is net force.
A car accelerates from rest to a velocity of 60 m/s [E] in 20 seconds. What is its acceleration.
3 m/s2 [E]
The force that always opposes motion.
What is friction.
The force responsible for slowing down a skydiver.
What is air resistance or fluid friction or lift.
What are three ways we can tell if something is accelerating?
speeding up slowing down changing direction
This is what a bigger arrow in a free body diagram means.
What is a stronger force (greater magnitude).
The unit of force and its abbreviation.
What is Newtons (N).
What is balanced.
The support force that counteracts gravity
What is normal force.
Final Velocity = 50 m/s south Initial Velocity = 60 m/s south Time to change velocity = 5 seconds What is the acceleration of this object?
-2 m/s squared, south
The net force in a tug of war if someone is pulling left with 1500 N and someone is pulling right with 1400 N.
What is 100 N left.
An car is traveling at 20 m/s [N]. The driver then sees a cop and slows down to 13 m/s [N] in 2 seconds. What is the acceleration of the car?
-3.5 m/s2 [N]
A change in motion of an object will only occur if the forces acting on it are ________________.
What is unbalanced.
What are the 4 forces that you might see on a free body diagram
Acceleration is this if the object is moving at a constant speed.
What is zero.
Draw a free body diagram for a water bottle sitting on a table.
What is normal force up and gravity down.
If I slowed down at a rate of 2 m/s2 for 4 seconds after traveling a velocity of 18.5 m/s, what is my final velocity?
What is 10.5 m/s
If the friction force is greater than the applied force, the object will...
not move
The formula from Newton's second law is
F = m x a
What formula would we use if we wanted to find out how an object's velocity changed within a certain period of time?
What is Acceleration
Draw a free body diagram of a paper airplane coasting through the air to the right.
What is gravity down, lift (air resistance) up, and drag (air resistance) left.
How long does it take for a space shuttle to accelerate from the launch pad to a final velocity of 8046 m/s if it accelerates at a constant rate of 28 m/s2?
287 - 288 seconds