Unit 3 Test Review

Multiple Choice

What is momentum?

• Momentum is the ratio of force to time.
• Momentum is the sum of mass and acceleration.
• Momentum is the change in energy over distance.
• Momentum is the product of mass and velocity.

Multiple Choice

Which of the following objects has NO momentum?

• a parked truck

• a helium balloon raising into the air

• 
  a compact car accelerating down a freeway ramp

• 
  a rocket escaping Earth's gravity

Multiple Choice

Which two factors would directly cause a change in the momentum of a skateboard?

• Change in height and change in surface area.
• Change in direction and change in friction.
• Change in speed and change in temperature.
• Change in mass and change in velocity.

Multiple Choice

What is the momentum of a ball that has a mass of 2kg moving at a velocity of 6 m/s?

• 3 kg m/s

• 12 kg m/s

• 8 kg m/s

• 4 kg m/s

Multiple Choice

A 50 kg ball rolls east down the street at 5 m/s. Calculate the momentum of the ball. (p = mv)

• 55 kg*m/s west

• 10 kg*m/s west

• 250 kg*m/s east

• 500 kg*m/s east

Dropdown

Objects in an Elastic Collision​ ​

Select answer

each other. While objects in Inelastic Collisions​

Select answer

each other.

Multiple Choice

What type of collision is shown here?

• Inelastic Collision

• Elastic Collision

• Explosive Collision

Multiple Choice

What type of collision is shown here?

• Inelastic Collision

• Elastic Collision

• Explosive Collision

Multiple Choice

What type of collision is shown here?

• Inelastic Collision

• Elastic Collision

• Explosive Collision

Multiple Choice

What type of collision is shown here?

• Inelastic Collision

• Elastic Collision

• Explosive Collision

Poll

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Multiple Choice

What is the scientific definition of work?

• the energy transferred by an object in motion

• the sum of all forces acting on an object

• using a force to move an object a distance

• the rate at which energy is consumed over time

Multiple Choice

Which situation here is work NOT being done?

• Kicking a soccer ball down the field

• Lifting a water bottle to take a drink

• Staring at a wall

• Sliding a couch along the floor

Multiple Choice

How much work is done when a lever is pushed a distance of 2 meters with a Force of 100 Newtons?

• 102 Joules

• 98 Joules

• 50 Joules

• 200 Joules

Multiple Choice

Which scenario requires the most work?

• 
  pushing a lawnmower a distance of 20 m with a force of 120 N

• 
  pushing a table a distance of 10 m with a force of 120 N

• 
  dragging a suitcase 30 meters with a force of 60 N

• 
  lifting a 60 N bag a distance of 10 m

Match

Match each photo with the Simple Machine that describes it

• Ax

• Jar Lid

• Rolling Pin

Wedge

Screw

Wheel and Axel

• Wedge

• Screw

• Wheel and Axel

Match

Match each photo with the Simple Machine that describes it

• Slide

• Seesaw

• Gym Equipment

Inclined Plane

Lever

Pulley

• Inclined Plane

• Lever

• Pulley

Labelling

Scissors are a type of lever, where is the INPUT FORCE, FULCRUM and OUTPUT FORCE?

Drag labels to their correct position on the image

fulcrum

output force

input force

Poll

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GPE = mgh

Multiple Choice

At which point is POTENTIAL energy the LEAST?

• W

• X

• Y

• Z

Multiple Choice

At which point is POTENTIAL energy the GREATEST?

• W

• X

• Y

• Z

Multiple Choice

At which point is KINETIC energy the LEAST?

• X

• Y

• W

• Z

Multiple Choice

At which point is KINETIC energy the GREATEST?

• Z

• W

• X

• Y

Multiple Choice

Types of Energy: Car Headlights

• Light

• Chemical Potential

• Thermal

• Electrical

Multiple Choice

Types of Energy: Car Battery

• Light

• Chemical Potential

• Thermal

• Electrical

Multiple Choice

Types of Energy: Seat Warmers

• Light

• Chemical Potential

• Thermal

• Electrical

Multiple Choice

Types of Energy: Car Wiring

• Light

• Chemical Potential

• Thermal

• Electrical

Multiple Choice

The Law of Conservation of Energy states:

• Energy is a nonrenewable resource and must be conserved

• If you waste energy, you have broken the law

• Energy cannot be created or destroyed

• Energy is destroyed faster than it is created

Multiple Choice

A battery is connected to a light bulb. When the wires are all connected, electrical energy is transformed into 10 joules of light energy and 5 joules of heat energy.

Which statement about the amount of electrical energy must be true to follow the law of conservation of energy?

• The electrical energy is 20 joules

• The electrical energy is 5 joules

• The electrical energy is 15 joules

• The electrical energy is 10 joules

Multiple Choice

Energy transfer: A fan that moves when powered on

• Electrical to Kinetic

• Electrical to Thermal

• Chemical Potential to Thermal

• Elastic Potential to Kinetic

Multiple Choice

Energy transfer: A toaster burning the toast

• Electrical to Kinetic

• Electrical to Thermal

• Chemical Potential to Thermal

• Elastic Potential to Kinetic

Multiple Choice

Energy transfer: A Butane lighter

• Electrical to Kinetic

• Electrical to Thermal

• Chemical Potential to Thermal

• Elastic Potential to Kinetic

Multiple Choice

Energy transfer: Firing an arrow

• Electrical to Kinetic

• Electrical to Thermal

• Chemical Potential to Thermal

• Elastic Potential to Kinetic

Poll

How ya doing?

• I got this! 🤩

• I'm getting there 😀

• I could use some more practice 🫤

• Help! 😫