ch 7

Question 1

what is linear momentum

Answer 1

the product of mass and velocity

Question 2

physical law that states that the net external force equals the change in momentum of a system divided by the time over which it change

Answer 2

newton’s second law

Question 3

linear momentum equation.

Answer 3

p=mv

Question 4

change in momentum

Answer 4

difference in final and initial momentum, mass x change in velocity

Question 5

impulse

Answer 5

the avg external net force times the time it

acts, upon on, equals to momentum

Question 6

conservation of momentum principle

Answer 6

when the net external force is zero, the total momentum of the system is conserved or constant

Question 7

isolated system

Answer 7

a system in which the net external force is zero

Question 8

elastic collision

Answer 8

collision that conserves all its energy and momentum

Question 9

inelastic collision

Answer 9

a collision in which internal kinetic energy is not conserved, but momentum is

Question 10

perfectly inelastic collision

Answer 10

a collision in which the colliding objects stick together