Momuntum

Question 1

Natural law of momentum

Answer 1

Total momentum before collision is equal to the total momentum after collision excluding external forces

Question 2

Momentum for explosions

Answer 2

m1v1+m2v2 = 0
Initial momentum is zero
Afterwards, each object leaves at the same equal momentum

Question 3

Ways to calculate Impulse

Answer 3

Impulse = Ft
Difference of p = mv-mu
Ft = mv-mu
Area under graph

Question 4

Ways to reduce impulse in car crash

Answer 4

Crumple zone
Area for car to deform before absorbing maximum impact

Airbags
Increase time for driver to halt

Seatbelts
Apply force in opposite direction, reducing unbalanced force