Collsions

Question 1

Impulse definition

Answer 1

the product of the force and the time of impact is equal to the change of momentum

Question 2

impulse eqn

Answer 2

Δp=mΔv
or
Δp=FΔt, where Force is constant

Question 3

For a graph of Fnet-t, find impulse

Answer 3

by calculating area under the graph

Question 4

When F is constant, impulse=

Answer 4

FΔt

Question 5

When F is not constant, impulse=

Answer 5

area under F-t graph

Question 6

When <F> is given, impulse=</F>

Answer 6

<F> x t
</F>

Question 7

The Principle of Conservation of Momentum states that

Answer 7

the total momentum of a system of objects remain constant, provided no net external force acts on the system

Question 8

The Principle of Conservation of Momentum eqn

Answer 8

m1u1+m2u2=m1v1+m2v2

Question 9

Characteristics of an elastic collision

Answer 9

1.Total momentum is conserved
2. No loss in KE

Question 10

Characteristics of an inelastic collision

Answer 10

1. Total momentum if conserved
2. Loss of KE

Question 11

Characteristics of a perfectly inelastic collision

Answer 11

1. Total momentum if conserved
2. Loss of KE
3. Stick tgt after collision (same v or a)

Question 12

Equations that can be used for elastic collision

Answer 12

1. COM (m1u1+m2u2=m1v1+m2v2)
2. COKE (1⁄2m1u1^2+1/2m2u2^2=1/2m1v1^2+1/2m2v2^2)
3. ROA=ROS (u1-u2+v2-v1)

Question 13

Equations that can be used for inelastic collision

Answer 13

1. COM (m1u1+m2u2=m1v1+m2v2)

Question 14

Equations that can be used for perfectly inelastic collision

Answer 14

1. COM (m1u1+m2u2=m1v1+m2v2)