Our Dynamic Universe 3 Flashcards
1
Q
What does momentum mean
A
The product of mass and velocity
2
Q
Momentum is a conserved property. This means …
A
That the total momentum before is equal to the total momentum after
3
Q
What is an elastic collision
A
The total kinetic energy is the same before and after
4
Q
What is an inelastic collision
A
Kinetic energy is lost during the collision
5
Q
What is the definition of impulse
A
The product of force and time it oils also defined as the change in momentum
6
Q
Explain how airbags can prevent injury during a collision
A
Air bags increase the time of contact in a collision which reduces he average force on the person
