Momentum - Impulse

Momentum - Impulse

Mohamad Fawal

Linear Momentum

Mohamad Fawal

Open Ended

What do you know about momentum?

Labelling

which?

Drag labels to their correct position on the image

more

less

Open Ended

why?

​momentum is the "quantity of motion" an object has

Multiple Choice

Which has more momentum: the truck or the toy truck, given both are moving at 10 m/s?

• The truck

• The toy truck

• Both have the same momentum

• Cannot be determined

Labelling

which?

Drag labels to their correct position on the image

less

more

Open Ended

why?

​momentum is the "quantity of motion" an object has

Multiple Choice

Which has more momentum: the toy truck moving at 35 m/s or the toy truck moving at 10 m/s?

• The toy truck at 35 m/s

• The toy truck at 10 m/s

• Both have the same momentum

• Cannot be determined

Multiple Choice

Which of the following best describes momentum?

• The resistance of an object to change its state of rest

• The product of an object's mass and velocity

• The energy possessed by an object due to its position

• The force required to move an object

Open Ended

Explain how mass and velocity each affect the momentum of an object, using examples from the images.

Multiple Choice

Which of the following equations correctly represents the relationship between force, change in momentum, and time?

• F = Δp/Δt

• F = p × t

• F = m/v

• F = Δt/Δp

Multiple Select

Which of the following scenarios best illustrates the conservation of momentum? Select all that apply.

• Explosion

• Hit and Bounce

• Hit and Stick

• A stationary object remaining at rest

Multiple Choice

Which law explains why the cannon recoils when a cannonball is fired?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Law of Universal Gravitation

Multiple Choice

What is the velocity of the 80 kg person after throwing the 8 kg bowling ball at 10 m/s, according to the conservation of momentum?

• 1 m/s

• -1 m/s

• 10 m/s

• -10 m/s

Draw

find v=? m/s

Draw

find v=? m/s

Draw

find v=? m/s

​In an inelastic collision, kinetic energy is not conserved because it is converted into other forms of energy, such as heat, sound, and the work required to permanently deform the objects.

Multiple Select

Which of the following statements are true about inelastic collisions?

• Kinetic energy is not conserved

• Momentum is always conserved

• Objects stick together after collision

• Kinetic energy is always conserved

Multiple Choice

Momentum is a ____________________ quantity

• science
• scalar
• vector
• energy

Multiple Choice

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

Multiple Choice

The definition of momentum is

• Mass in Motion
• The size of an object
• The velocity of an object
• A comparison between two objects

Multiple Choice

If two objects have the same mass, then the faster moving object has ____________ momentum.

• more 
• less
• the same

Multiple Choice

Momentum is represented with which letter?

• b

• m

• v

• p

Multiple Choice

What is the unit for momentum?

• m/s

• kg

• N

• kg* m/s

• J

Multiple Choice

Momentum is always conserved.

• True

• False

Multiple Choice

A bouncy ball hitting the ground.

• Elastic Collison

• Inelastic Collision

Multiple Choice

A ball falls on chewed gum.

• Elastic Collison

• Inelastic Collision

Multiple Choice

After an inelastic collision both objects will...

• move at the same speed

• have less mass

• change momentum

• have different speeds

Open Ended

How would you explain the concept of momentum to someone who has never studied physics before?

Impulse

Mohamad Fawal

Momentum Impulse Theorem

• This is exactly like the Work-Energy Theorem from last unit

• Doing Work added Energy to a system

• Replace the word "Work" with 'Impulse"

• Replace the word "Energy" with "Momentum"

• Doing Impulse adds Momentum to a system

Multiple Choice

Find the impulse of an object that experiences 40 N of force over 9 seconds.

• 360 N
• 360 Ns
• 400 Ns
• 320 Ns

Multiple Choice

Oliver is playing a game of baseball. If he hits the ball with a force of 30 N, how much time will it take for him to create an impulse of 900 Ns?

• 20 seconds
• 30 seconds
• 10 seconds
• 15 seconds

Multiple Choice

Find the impulse of an object that experiences 900 N of force over 2 seconds.

• 1800 Ns
• 450 Ns
• 900 Ns
• 2700 Ns

Multiple Choice

The impulse-momentum theorem states that

• the impulse on an object is equal to the change in momentum it causes 
• the force on a moving object is equal to the magnitude of the impulse.
• the impulse on an object is greater than the change in momentum it causes 
• the impulse on an object is less than the change in momentum it causes

Multiple Choice

When the speed of an object is doubled, its momentum...

• remains unchanged in accord with the conservation of momentum.

• doubles.

• quadruples.

• decreases.

Multiple Choice

The units for Impulse are

• N/s
• N-s
• N
• m/s

Multiple Choice

What is the change in momentum (impulse)?

(+ means rightward direction & - means leftward direction)

• Impulse = +15 N•s

• Impulse = +4 N•s

• Impulse = +7.5 N•s

• Impulse = +8 N•s

• Impulse = +30 N•s

Multiple Choice

What is the change in momentum (impulse)?

(+ means rightward direction & - means leftward direction)

• Impulse = +1.3 N•s

• Impulse = -2.7 N•s

• Impulse = +4 N•s

• Impulse = -8 N•s

• Impulse = -24 N•s

Multiple Choice

What is the change in momentum (impulse)?

(+ means rightward direction & - means leftward direction)

• Δp = +3 kg*m/s

• Δp = +6 kg*m/s

• Δp = +12 kg*m/s

• Δp = +15 kg*m/s

• Δp = +30 kg*m/s

Multiple Choice

What is the change in momentum (impulse)?

(+ means rightward direction & - means leftward direction)

• Δp = -9 kg*m/s

• Δp = -15 kg*m/s

• Δp = -18 kg*m/s

• Δp = -30 kg*m/s

• Δp = -36 kg*m/s

Multiple Choice

What is the change in momentum (impulse)?

(+ means rightward direction & - means leftward direction)

• F = +2 N, Δt = 3 s

• F = +6 N, Δt = 2 s

• F = +9 N, Δt = 2 s

• F = +9 N, Δt = 1 s

• F = +3 N, Δt = 1 s

Multiple Choice

What is the change in momentum (impulse)?

(+ means rightward direction & - means leftward direction)

• Impulse = +11 N•s

• Impulse = +12 N•s

• Δp = +3 kg•m/s

• F = +3 N, Δt = 3 s

• F = +12 N, Δt = 4 s

Multiple Choice

What food group do strawberries belong to?

• Vegetable
• Dairy
• Grains
• Fruit

Multiple Select

Check all that apply: Momentum involves

• speed

• direction

• mass

• force

Match

Match the following units with their variables!

• Mass

• Velocity

• Impulse

• Momentum

• Time

kilograms

m/s

Ns

kg⋅m/s

seconds

• kilograms

• m/s

• Ns

• kg⋅m/s

• seconds

Match

Match the following definitions to their terms.

• Momentum

• Impulse

• Elastic collision

• Inelastic collision

The product of mass and velocity

Product of net force over the time

kinetic energy is conserved, they bounce

kinetic energy not conserved, they stick

• The product of mass and velocity

• Product of net force over the time

• kinetic energy is conserved, they bounce

• kinetic energy not conserved, they stick

Math Response

Bonus!!!
An cart collided with a wall. The collision lasted from 1.2 to 1.6 seconds and is depicted in the momentum-time graph above.

Calculate the external force that this cart experienced as a result of this collision.

$$m\cdot\Delta v=F\cdot\Delta t$$

$$\Delta p=F\cdot\Delta t$$

Type answer here

Correct Answer: -1125

Deg^°

Rad

Draw

Bonus!!!
An cart collided with a wall. The collision lasted from 1.2 to 1.6 seconds and is depicted in the momentum-time graph above.

Calculate the external force that this cart experienced as a result of this collision.

$$m\cdot\Delta v=F\cdot\Delta t$$

$$\Delta p=F\cdot\Delta t$$

Match

General Revision: Match the following

• $$F=ma$$

An object accelerates because a force acts on it.

Force is equal to the mass of an object times acceleration

The larger the mass, the greater the force needed to accelerate it

An object at rest will stay at rest unless acted upon by an unbalanced force.

An object in motion will stay in motion unless acted upon by an unbalanced force.

• An object accelerates because a force acts on it.

• Force is equal to the mass of an object times acceleration

• The larger the mass, the greater the force needed to accelerate it

• An object at rest will stay at rest unless acted upon by an unbalanced force.

• An object in motion will stay in motion unless acted upon by an unbalanced force.

Multiple Choice

Which of the following has the MOST momentum? (they are all rolling at the same velocity)

• rolling ping-pong ball

• rolling bowling ball

• rolling soccer ball

• rolling basketball

Multiple Choice

This picture is an example of ____________

• Elastic Collision
• Inelastic collision

Multiple Choice

What is the property of a moving object that causes it to keep moving?

• Momentum
• Acceleration
• Speed
• resistance

Multiple Choice

What is Newton's Law of Conservation of Momentum?

• Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
• Force = mass x acceleration
• For every action there is an equal and opposite reaction
• Momentum can not be created or destroyed without outside forces

Multiple Choice

True/False:  The momentum does not change unless outside forces act on the objects.

• True
• False

Multiple Choice

True/False:  Inelastic Collision causes a rebound.

• True
• False

Multiple Choice

True/False:  Elastic Collision causes a rebound.

• True
• False

Multiple Choice

The momentum of an object depends upon the object's ___________&_____________.  

• size and shape
• mass and veloctiy
• mass and energy

Multiple Choice

What food group does steak belong to?

• Dairy
• Vegetables
• Protein
• Grains

Best Wishes!