Force What
FBD's
What's The Net
Impulses
Collisions
100
When one object pushes or pulls upon another
What is applied force (Fapp)?
100
Direction that force arrows point in an FBD.
What is outward?
100
Net force on a block being pulled to the right across the floor with a 20 N applied force and 5 N of friction.
What is 15 N to right?
100
mass in motion (or mass times the velocity)
What is momentum (p)?
100
When momentum is conserved.
What is "Always unless outside impulse involved"?
200
Another name for weight.
What is force of gravity (Fg)?
200
First force shown on any FBD (in this class). Include the direction and how it is calculated.
What is gravity? pointing down and Fg = m*g
200
mathematical expression for net acceleration given net force and mass.
What is
a = "Fnet"/"mass"
200
Force applied for a given period of time.
What is impulse?
200
An elastic collision.
What is a collision where objects remain separate? (bouncy)
300
When force is transferred along a rigid object, this is in play.
What is tension (T or Ftens)?
300
A FBD of an object at rest on a table.
300
Net Force Given the Information Below
What is 15 N to the right?
300
The impulse upon a given object is always_______
What is "equal to the change in momentum"?
300
An inelastic collision.
What is a collision where objects stick together (or started out together and separate)? (sticky)
400
Restorative force that occurs when an object returns to original shape
What is spring (or elastic) force? Fspring or Felast
400
FBD of a skydiver immediately after parachute opens when acceleration is in upward direction.
What us something like this?
400
The Equation for the Net Force given the FBD below.
What is Fnet = 80N - 60N to the left?
400
The force that would need to be applied to stop a 100kg running back moving at 6 m/s in a period of 0.5 sec
What is 1200N ? (F = mv/t = 100kg*6m/s /0.5 sec)
400
What you have to do to velocities in different directions to make momentum math work.
What is give opposite directions opposite signs?
500
the direction that friction always points
What is opposite motion?
500
free body diagram car skidding to stop on level ground
500
The tension force on a 10 kg bucket being accelerated upward out of a well with a net acceleration of 1.5 m/s2
What is 115 N upward?
(Fnet = ma = Ftens - Fg so Tension = ma + mg)
500
Why you should bend your knees when you land from a jump.
What is extending time by bending your knees reduces the force your skeleton needs to exert?
500
for Collision Below indicate the label the arrow that represents vBf
What is arrow f?