Machines, Efficiency, & Mechanical Advantage

What is the primary definition of a machine according to the text?

• A device that generates energy

• A device that helps us do work more easily

• A device that converts electricity to motion

• A device that stores potential energy

Which statement best describes work in physics?

• Any physical activity that requires effort

• The amount of energy stored in a system

• Force applied over a distance to move an object

• The power needed to operate a machine

In the context of machines, what is input force?

• The force generated by the machine

• The force applied to the object

• The force applied by the user to the machine

• The force lost during operation

What happens to the output force when the input distance is increased?

• The output force decreases

• The output force remains the same

• The output force increases

• The output force becomes negative

Which is NOT one of the primary ways machines modify forces?

• Increasing the magnitude of force

• Storing energy for later use

• Changing the direction of force

• Increasing the distance of force application

What is the relationship between force and distance in machines?

• Both force and distance can be increased simultaneously

• Force and distance are always equal

• When one increases, the other must decrease

• They are completely independent variables

What defines a simple machine?

• It has multiple moving parts

• It consists of a single mechanical part

• It requires electrical power

• It must increase both force and distance

How does a rake demonstrate mechanical principles?

• It only changes the direction of force

• It increases both force and distance equally

• It moves a greater distance with less force at its end

• It stores energy for later use

Which statement about compound machines is correct?

• They consist of only one simple machine

• They work independently of simple machines

• They combine two or more simple machines

• They only use electrical components

When using a machine, what is output distance?

• The total distance the machine can move

• The distance over which the input force is applied

• The distance the machine applies force to an object

• The distance between the machine's parts