MA, IMA, and Efficiency

What is the definition of mechanical advantage in simple machines?

• The ratio of input distance to output distance

• The ratio of output force to input force

• The product of input force and input distance

• The difference between input and output work

Which term describes the force you apply to a machine?

• Output force

• Input force

• Mechanical advantage

• Efficiency

What is the formula for calculating work?

• Work = Force + Distance

• Work = Force × Distance

• Work = Force ÷ Distance

• Work = Distance ÷ Force

Which of the following best defines efficiency in a simple machine?

• The ratio of input force to output force

• The ratio of output work to input work

• The sum of input and output distances

• The difference between input and output force

Tags

NGSS.MS-ETS1-1

What does the term "ideal mechanical advantage" (IMA) refer to?

• The mechanical advantage with friction included

• The mechanical advantage without considering friction

• The efficiency of a machine

• The input force required to move a load

Which equation represents the ideal mechanical advantage (IMA) of a machine?

If you apply a force of 10 N over a distance of 5 m, how much work do you do?

• 2 J

• 15 J

• 50 J

• 5 J

A machine requires an input force of 20 N to lift a 60 N load. What is its mechanical advantage?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-2

If the input distance of a lever is 2 m and the output distance is 0.5 m, what is the ideal mechanical advantage?

• 0.25

• 0.5

• 2

• 4

A machine has an input work of 200 J and an output work of 150 J. What is its efficiency?

• 50%

• 65%

• 75%

• 80%

Tags

NGSS.MS-PS3-5