Work and Machines - Multiple Choice Quiz

What is a machine?

• A device that creates energy

• A device that makes work easier

• A device that removes friction completely

• A device that reduces work output

How does a machine make work easier?

• By increasing the amount of work done

• By lowering the size or changing the direction of the applied force

• By removing energy from the system

• By doubling the input force

Which of the following is an example of a simple machine?

• Screwdriver

• Electric Motor

• Washing machine

• Generator

What is the work you do on a machine called?

• Work output

• Mechanical efficiency

• Mechanical advantage

• Work Input

What is the formula for work?

• W = F ÷ d

• W = m × a

• W = F x d

• W = m × v

What is the force you apply to a machine called?

• Output force

• Input force

• Reaction force

• Resistance force

What is the force a machine applies to an object called?

• Input force

• Work efficiency

• Work input

• Output Force

Machines make work easier by:

• Increasing both the force and the distance applied

• Lowering the size or direction of the input force

• Increasing the amount of work done

• Decreasing the amount of friction to zero

When output force increases in a machine, the distance the object moves must:

• Increase

• Stay the same

• Decrease

• Double

Mechanical advantage is calculated by:

• Input force ÷ output force

• Output force ÷ input force

• Output work ÷ input work

• Input work ÷ output work