Momentum and Energy

Basic Momentum

100

mass X velocity

momentum

200

what has more momentum- a 12kg dog running at 6m/s or an 88kg buffalo that is stationary

The 12kg Dog

300

An 1100g glass of mountain dew is launched to the left at a speed of 12m/s. what is the momentum?

13.2kg*m/s

400

A golf ball (m = 0.20kg), initially at rest, is struck and travels with a velocity of 100m/s. What is the change in momentum of the golf ball during the hit?

+20kg*m/s

500

A marble (m = 15g) is rolling along a frictionless surface at an initial speed of 7m/s to the right. It runs into a chewed piece of gum (m = 35g) and the gum sticks to the marble. If the marble continues to roll to the right and momentum is conserved, what will the final velocity of the marble + gum be?

2.1m/s to the right

Conservation of Momentum

100

P_i = 99kg*m/s

P_f = 98kg*m/s

Is momentum conserved?

No

Momentum is not conserved

200

P_i,1 = 25kg*m/s

P_i,2 = 7kg*m/s

P_f,1 = 7kg*m/s

P_f,2 = 30kg*m/s

Is momentum conserved?

No

Momentum is not conserved

300

P_i = 4kg*m/s

m_f = 1kg

v_f = ??

v_f = 4m/s

400

m_i,1 = 10kg

v_i,1 = 1.3m/s

m_f,1 = ??

v_f,1 = 1m/s

m_f,1 = 13kg

500

m_i,1 = 10kg         m_i,2 = 7kg

v_i,1 = 4m/s         v_i,2 = 1m/s

m_f,1 = 10kg           m_f,2 = 7kg

v_f,1 = ??          v_f,2 = 6m/s

v_f,1 = 0.5m/s

Collisions +Energy

100

this type of collision causes 100% of the energy to be transferred from object 1 to object 2

Elastic Collision

200

object 1 (m = 2.00kg) is moving at an initial velocity of 10m/s and collides with object 2 (m = 5.50kg). After the collision the two balls stick together and move forward with a single velocity. What type of collision is occurring?

Perfectly Inelastic Collision

300

if object 1 and object 2 collide and bounce off one another and 70% of the energy is transferred from object 1 into object 2, what type of collision is occuring?

Inelastic Collision

400

DAILY DOUBLE

What kind of system must be present for momentum to be conserved during a collision?

500

Ball 1 has a velocity of 2m/s. Ball 2 has a velocity of -2m/s. If the mass of ball 1 is equal to the mass of ball 2 and they have a perfectly inelastic collision, then what is the final velocity of ball 2?

0m/s

Potentially Kinetic

100

PE

Potential Energy

200

A basketball is rolling along frictionless grass at a velocity of 12m/s. If the basketball has a mass of 3kg, what is it's kinetic energy?

216J

300

If the basketball (m = 3kg) is measured to have a kinetic energy of 500J, how fast is it moving?

18.3m/s

400

A basketball (m = 3kg) is rolling along frictionless grass at a velocity of 12m/s. If there is a hill that is 700cm tall, will the ball be able to roll all the way up the frictionless hill?

Yes

500

A basketball (m = 3kg) is rolling along frictionless grass at a velocity of 20m/s. Assuming there is a complete transfer of energy from kinetic to potential, what is the tallest hill that the basketball will be able to roll to the top of?

A 20.4m hill

RANDOM!!

100

three words that define "momentum"

"Mass in Motion"

200

DAILY DOUBLE

Write Newton's 2nd law as clearly as possible

300

A marble (m = 15g) is rolling along a frictionless surface at an initial speed of 7m/s to the right. It runs into a chewed piece of gum (m = 35g) and the gum sticks to the marble. If the marble continues to roll to the right and momentum is conserved, what type of collision is occurring here?

Perfectly Inelastic Collision

400

P_initial = P_final 

(What law does this represent?)

Conservation of Momentum

500

An object with a mass of 1kg is initially 99cm off the ground. If its potential energy is completely transferred into kinetic energy, what is the maximum velocity of the object as it falls?

4.40m/s down