P10.4 Momentum Flashcards
Why does a bike break faster than a truck
The truck because it has the greatest mass. Therefore it has the greatest momentum. It requires a larger amount of energy to dissipate in order to bring it to a stop
What is momentum
A property of a moving object which depends on how much mass and velocity
How to work out momentum?
p = mv
(Momentum = mass x velocity)
What is a closed system
A physical system that does not exchange matter or energy with its surroundings
Why would a ball swinging without any oxygen or air resistance around it swing forever
Because energy cannot be created or destroyed
Why would a gun recoil,when it fires a bullet using knowledge of momentum
A gun recoils when it fires a bullet because, according to the law of conservation of momentum, the momentum of the bullet moving forward is balanced by an equal and opposite momentum that pushes the gun backwards
How to work out The equation with cars and impact
M1u1 + m2u2 = m1v1 + m2v2
Whats the conservation of momentum between 2 objects
Momentum before = momentum after
How to find the velocity immediately after 2 ice hockey players colliding
Total momentum / total velocity
Explain why a soft surface reduces the impact of a collision
Increases time taken to stop
Increases time taken to reduce momentum
Rate of momentum is reduced
Impact and force is reduced
