30.6 STS Work and Machines Part1

Multiple Choice

What is energy?

• Energy is the ability to do work or produce change.
• Energy is the sound of music
• Energy is the taste of chocolate
• Energy is the color of the sky

Multiple Choice

What are examples of change? Choose the best answer

• moving,

• changing shape,

• changing temperature.

• all of the above

Multiple Choice

What is work (in physics)?

• Work in physics is the product of energy and power.
• Work in physics is the product of time and velocity.
• Work in physics is the product of mass and acceleration.
• Work in physics is the use of force to move an object

Multiple Choice

What is power?

• Power is the ability to speak multiple languages
• Power is the ability to bake a cake
• Power is a measure of the amount of work that can be done in a given amount of time.

• Power is the ability to fly

Multiple Choice

What is a machine?

• A machine is a living organism
• A machine is any device that makes work easier by changing a force.

• A machine is a type of fruit
• A machine is a fictional character in a book

Multiple Choice

What is it called whenever a force moves an object over a distance?

• Force
• Energy
• Work
• Power

Multiple Choice

What kind of simple machine is a broom?

• lever
• screw
• pulley
• wheel

Multiple Choice

What is a lever?

• A mathematical concept

• A type of simple machine

• A complex tool

• A form of energy

Multiple Choice

In a first class lever, where is the fulcrum located?

• Between the force and the load

• On one end

• In the middle

• On the opposite end of the force

Multiple Choice

Which of the following is an example of a second class lever?

• Scissors

• Hockey stick

• Wheelbarrow

• Hammer

Multiple Choice

How many classes of levers are there?

• Two

• Three

• Four

• Five

Multiple Choice

What is the primary function of a lever?

• To change the direction of the applied force

• To decrease the amount of effort needed to move an object

• Both A and B

Multiple Choice

A lever decreases the amount of effort you need to put into moving an object by

• applying more force
• increasing the distance from the fulcrum

• decreasing the distance from the fulcrum
• using a heavier object

Multiple Choice

Scissors are made of which two simple machines?

• pulley and screw
• wheel and axle
• inclined plane and screw
• lever and wedge

Multiple Choice

What is a fulcrum?

• The point on which a lever pivots or rotates.
• A unit of measurement
• A type of screw

Multiple Choice

What is our next activity?

• The next activity is to take a nap.
• The next activity is to calculate our own horsepower.

• The next activity is to go skydiving.
• The next activity is to bake a cake.

Multiple Choice

Who is pictured on this slide?

• Mrs. D's supercute grandchild

• Not this answer!

Multiple Choice

What is work?

• Work is the use of force to move an object

• Work is the measure of temperature change in a system
• Work is the measure of distance covered by an object
• Work is the measure of time spent on a task

Multiple Choice

What is force?

• Force is a push or pull upon an object resulting from the object's interaction with another object.
• Force is a type of matter
• Force is a form of energy
• Force is a color

Multiple Choice

When it comes to the motion of everyday objects, however, the forces are mainly

• Interactions such as gravity, friction, and applied force.

• Interactions such as heat, sound, and light.
• Interactions such as inertia, momentum, and velocity.
• Interactions such as magnetism, tension, and compression.

Multiple Choice

What is applied force?

• Force applied to a person
• Force applied to a liquid
• Force applied to the air
• Force that a person or thing applies to an object.

Multiple Choice

What is the unit of force?

• Kilogram (kg)
• Meter (m)
• Joule (J)
• Newton (N)

Multiple Choice

What is the unit for work?

• watt (W)
• newton (N)
• ampere (A)
• joule (J)

Multiple Choice

Explain the Joule

• The Joule is the amount of work that is done when 1 N of force moves an object over a distance of 1 m.

• The Joule is a measurement of temperature.
• The Joule is a type of fruit.
• The Joule is a unit of time.

Multiple Choice

Work is directly related to both the

• mass and acceleration
• energy and power
• velocity and time
• force and distance/displacement

Multiple Choice

What is the equation for work?

• Work = Force x Distance
• Work = Energy / Time
• Work = Velocity x Time
• Work = Mass x Acceleration

Multiple Choice

What is power?

• Power is the speed at which work is done.
• Power is a measure of the amount of work that can be done in a given amount of time.

• Power is the ability to generate electricity.
• Power is the ability to lift heavy objects.