9.1 Momentum And Impulse Flashcards
(12 cards)
What is the gain of momentum of a ball when it’s is hit and initially stationary
MV
What is the impact force
Change of momentum / contact time
Mv/t
What is the impact force of a ball that had an initial velocity
F= mv-mu /t
What can the variation of an impact force with time on a it be recorded with
A force sensor conected to suitably long wire or radio link to computer
The force sensor is attached to object causing the impact
Because the force in the bat is equal and opposite to the ball what happens to the variation of the force
The force on the bat and the ball varies in exactly the same way
What is the area under a force time
Equal to the change in momentum
What can the average force of impact time be worked out with
Change of momentum / contact time
What happens to a balls momentum when it hits a wall normally
It’s momentum is reversed as its velocity is in the opposite direction
Impact force of a ball hitting a wall normally
-mv-mu/ contact time
If there is no loss of speed what is the impact force
-2mu / t
What happens to the impact force d when the impact is oblique and the angles are the same
-2mucos theta / t
