Mechanical Advantage and Efficiency

Front

What is the fixed point that a lever pivots around?

Back

Fulcrum

Front

What is the efficiency of a machine if the input is 263 J and the output is 142 J?

Back

54%

Front

How much effort would it take to lift Lever A?

Back

50 N

Front

What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced?

Back

26%

Front

What is a rigid bar that is free to pivot, or rotate, on a fixed point?

Back

Lever

Front

Define Mechanical Advantage.

Back

Mechanical Advantage is the ratio of the output force produced by a machine to the input force applied.

Front

What is the formula for calculating efficiency?

Back

Efficiency = (Output Work / Input Work) x 100%

Front

What does a higher mechanical advantage indicate about a machine?

Back

A higher mechanical advantage indicates that the machine can lift heavier loads with less effort.

Front

What is an example of a simple machine that uses a fulcrum?

Back

A seesaw is an example of a simple machine that uses a fulcrum.

Front

What is the relationship between input work and output work in a machine?

Back

Input work is the energy supplied to the machine, while output work is the energy the machine delivers.