Quiz on Simple and Compound Machines

What is a simple machine?

• A device that creates energy

• A machine that makes work easier by changing the force or its direction

• A machine that operates without any force

• A machine that only moves objects

Which of the following is not a simple machine?

• Pulley

• Lever

• Bicycle

• Inclined plane

A car is an example of:

• A simple machine

• A compound machine

• A lever

• A wedge

Mechanical Advantage (MA) is defined as:

• The ratio of effort force to resistant force

• The ratio of resistant force to effort force

• The product of force and displacement

• The difference between input and output work

The formula for Mechanical Advantage is:

• MA = Fe/Fr

• MA = Fr × Fe

• MA = Fr/Fe

• MA = de/dr

Ideal Mechanical Advantage (IMA) depends on:

• The force applied

• The distances moved by effort and resistance

• The weight of the machine

• The efficiency of the machine

The formula for IMA is:

• IMA = Fr/Fe

• IMA = de/dr

• IMA = Wo/Wi

• IMA = MA × e

In real machines, the Mechanical Advantage (MA) is always:

• Greater than IMA

• Equal to IMA

• Less than IMA

• Unrelated to IMA

For a compound machine, the total MA is:

• The sum of the MAs of its simple machines

• The product of the MAs of its simple machines

• The average of the MAs of its simple machines

• The difference between the MAs of its simple machines

Efficiency of a machine is calculated as:

• e = Wi/Wo × 100%

• e = Wo/Wi × 100%

• e = MA/IMA × 100%

• Both b and c