Simple Machines

Question 1

What is a simple machine?

Answer 1

A simple machine is a device that changes the direction or magnitude of a force and has few or no moving parts.

Question 2

What are the different types of simple machines?

Answer 2

The six basic types are:

• Lever
• Pulley
• Inclined plane
• Wedge
• Screw
• Wheel and axle

Question 3

What is mechanical advantage (MA)?

Answer 3

Mechanical advantage is the ratio of the output force to the input force in a machine.

Question 4

What is the formula for mechanical advantage?

Answer 4

MA = Output Force / Input Force

Question 5

What is velocity ratio (VR)?

Answer 5

Velocity ratio is the ratio of the distance moved by the effort to the distance moved by the load in a machine.

Question 6

Q: What is the formula for velocity ratio?

Answer 6

VR = Distance Moved by Effort / Distance Moved by Load

Question 7

What is the efficiency of a machine?

Answer 7

Efficiency is the ratio of the useful work output to the total work input, expressed as a percentage.

Question 8

What is the formula for efficiency?

Answer 8

Efficiency = (Mechanical Advantage / Velocity Ratio) × 100%