Linear Kinetics 2 Flashcards
What is impulse
a measure of a force applied for a certain amount of time .
The net force acting over some interval of time will cause
a change in momentum of an object
Impulse is the area under a ______ graph
force time
Changes in the momentum of a system depend on
- the magnitude of external forces
2. the time over which the forces act
An impulse can cause a change in ____
momentum
During human movement we are constantly trying to
change the velocity of something
During a squat jump, when is ground reaction force the greatest
lowest body position
Ground reaction force ____ from the lowest body position to the moment of take off
decreases
During a squat jump, when is velocity the greatest?
right before take off
During a squat jump, when is velocity the lowest?
landing
During a squat jump when does the initial dip in velocity occur
When lowering
When measuring using a force plate, if body weight is greater than ground reaction force, what is occuring
a negative change in momentum
What stops the downward motion of a squat jump?
Positive impulse
Negative impulse …. just prior to take off
slows the upward motion of the jumper
Using a force plate, what is the heigh the individual jumps determined by?
the net impulse - difference between the total positive impulse and the total negative impulse
