linear momentum

Question 1

momentum

Answer 1

quantity of motion that an object possesses
-M=mv

Question 2

conservation of momentum

Answer 2

-in the absence of external forces, the total momentum of a given system remotes constant

Question 3

altering momentum

Answer 3

-impulse

Question 4

impulse

Answer 4

-Force X time

Question 5

impulse-momentum relationship

Answer 5

-positive:
-negative:

Question 6

impact

Answer 6

-collision between 2 bodies over a very small time interval
-exchange of force over the time interval of contact
-perfectly elastic impact vs perfectly plastic impact: supernal vs modeling clay

Question 7

influencing factors of impact

Answer 7

-elasticity of 2 objects
-direction of impact

Question 8

elasticity

Answer 8

-at contact both surfaces are deformed
-will attempt to return back to original shape, causing a rebound

Question 9

newtons law of impact

Answer 9

-coefficient of restriction
-E= square root of (height bounce/ height drop)
-bodies together not separately

Question 10

direction of impact

Answer 10

-direct vs oblique impact
-oblique w/ a fixed surface
-oblique w/ a moving body

Question 11

oblique impact w fixed surface

Answer 11

-horizontal and vertical component
-role of friction
-angle of rebound: angle of incidence, angle of reflection, when friction is negligible

Question 12

oblique impact w moving bodies

Answer 12

-six variables to consider:
1. velocity of object 1
2. velocity of object 2
3. angle created by the vectors from 1&2
4. mass of object 1
5. mass of object 2
6. mutual coefficient of restriction

Question 13

spin & friction’s role in collision

Answer 13

-magnitude of friction modified according to role and direction of spin
-spin on the ball produces rotary & linear motion
-top spin
-back spin
-side spin