Mechanical Systems Quiz

What is the purpose of a mechanical system?

• To store energy

• To perform a task using force

• To create electricity

• To stop motion

Which of the following is NOT a simple machine?

• Pulley

• Inclined Plane

• Gear

• Screw

A lever rotates around a point called the:

• Load

• Fulcrum

• Axis

• Arm

Which simple machine is used in a knife?

• Lever

• Wedge

• Pulley

• Screw

A ramp is an example of which simple machine?

• Lever

• Wedge

• Screw

• Inclined plane

Which of the following increases mechanical advantage?

• Increasing the output force

• Increasing input force

• Using more oil

• Making the machine heavier

What is the formula for mechanical advantage (MA)?

• Work ÷ Force

• Distance ÷ Time

• Output Force ÷ Input Force

• Input Force ÷ Output Force

A machine has an MA of 4. What does this mean?

• It needs more force than usual

• It multiplies effort force by 4

• It is 4% efficient

• It loses 4 Joules of energy

Efficiency is the ratio of:

• Input to output energy

• Output work to input work

• Force to mass

• Load to effort

Why are real machines never 100% efficient?

• They are made of metal

• They have no load

• Friction and heat cause energy loss

• Input work is always zero