Ch7: Momentum Flashcards
What is rate of change of momentum?
Force
What is Newton’s 1st law of motion?
An object will remain at rest or continue to move with constant velocity until acted on by a resultant force.
What is Newton’s third law of motion?
When two objects interact, they exert equal and opposite forces on eachother.
What happens to momentum in a closed system?
It is conserved.
When two objects are travelling in opposite directions, what must be done when considering their velocities?
One direction must be considered negative.
What is conserved in an elastic collision?
Kinetic energy, momentum, and total energy
What is conserved in an inelastic collision?
Momentum, and total energy.
What happens to kinetic energy in an inelastic collision?
It is not conserved
What is Newton’s second law?
The resultant force on an object is directly proportional to its rate of change of momentum.
Momentum is mass times…
Velocity
What is the equation symbol for momentum?
p
Momentum is velocity times…
Mass
What is the impulse of a force?
Change in momentum
How can impulse be calculated?
Force x change in time
What does the area under a force/time graph represent?
Impulse ( because its force x change in time)
