Chapter 6 Momentum/Impulses

Question 1

momentum can be thought as

Answer 1

inertia in motion

Question 2

if you have mass and velocity you have what?

Answer 2

momentum

Question 3

momentum describes what 2 things?

Answer 3

• motion and how one object can change the motion of another object

Question 4

Is momentum vector or scalar

Answer 4

vector

Question 5

what is the equation for momentum?

Answer 5

p = m X v

Question 6

unit for momentum

Answer 6

kg m/s

Question 7

unit for impulse

Answer 7

N s

Question 8

equation for impluse

Answer 8

F(delta)t = m (delta)v = (delta) p

Question 9

(delta p) represents what

Answer 9

impluse

Question 10

momentum is defined as

Answer 10

mass X velocity

Question 11

examples of moving objects with large momentums are

Answer 11

• huge ship at low speed

- small bullet at high speed

Question 12

if an object is not moving it has

Answer 12

0 momentum

Question 13

when what acts on an object for a period of time we call it ___

Answer 13

• force

- impulse

Question 14

impulses are ____ when bouncing takes place

Why?

Answer 14

Greater (>)

because it requires more impulse to catch something (bring to momentum 0) and then throw it (provide additional impulse)

Question 15

force relates to momentum through

Answer 15

time

Question 16

what are collisions

Answer 16

when 2 or more objects hit each other

Question 17

What happens during a collision

Answer 17

• 2 objects in contact for some amount if time ((delta) t)

- forces have the same magnitude but in the opposite direction (newtons 3rd law)

Question 18

Conservation of momentum equation

Answer 18

m1v1 + m2v2 = m1v1’ + m2v2’

Question 19

Law of Conservation of momentum

Answer 19

the total momentum before a collision is the same as the total momentum after the collision

Question 20

Conservation of momentum law applies to:

Answer 20

all closed isolated systems

Question 21

closed:
isolated:
system:
definitons

Answer 21

closed: no momentum comes in our out of the sys.
isolated: no outside forces act on the system
system: all objects being studied

Question 22

Elastic collision

Answer 22

a collision in which colliding objects rebound without lasting deformation or the generation of heat
m1v1 + m2v2 = m1v1’ + m2v2’

Question 23

inelastic collision

Answer 23

a collision in which colliding objects become distorted, generate heat and possibly stick together
m1v1 + m2v2 = (m1 + m2) v’

Question 24

regarless of the angle what remains unchanged in a collision

Answer 24

net momentum