Flashcards in Chapter 6 Momentum/Impulses Deck (24):

1

## momentum can be thought as

### inertia in motion

2

## if you have mass and velocity you have what?

### momentum

3

## momentum describes what 2 things?

### - motion and how one object can change the motion of another object

4

## Is momentum vector or scalar

### vector

5

## what is the equation for momentum?

### p = m X v

6

## unit for momentum

### kg m/s

7

## unit for impulse

### N s

8

## equation for impluse

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

9

## (delta p) represents what

### impluse

10

## momentum is defined as

### mass X velocity

11

## examples of moving objects with large momentums are

###
- huge ship at low speed

- small bullet at high speed

12

## if an object is not moving it has

### 0 momentum

13

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

###
- force

-impulse

14

##
impulses are ____ when bouncing takes place

Why?

###
Greater (>)

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

15

## force relates to momentum through

### time

16

## what are collisions

### when 2 or more objects hit each other

17

## What happens during a collision

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

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

18

## Conservation of momentum equation

### m1v1 + m2v2 = m1v1' + m2v2'

19

## Law of Conservation of momentum

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

20

## Conservation of momentum law applies to:

### all closed isolated systems

21

##
closed:

isolated:

system:

definitons

###
closed: no momentum comes in our out of the sys.

isolated: no outside forces act on the system

system: all objects being studied

22

## Elastic collision

###
a collision in which colliding objects rebound without lasting deformation or the generation of heat

m1v1 + m2v2 = m1v1' + m2v2'

23

## inelastic collision

###
a collision in which colliding objects become distorted, generate heat and possibly stick together

m1v1 + m2v2 = (m1 + m2) v'

24