If you exert a force of 20 newtons on a can opener and the opener exerts a force of 60newton on the can the ideal mechanica advantage of the can opener is?
The ideal mechanical advantage of the can opener is calculated as the ratio of the output force to the input force. In this case, it would be 60 newtons (output force) divided by 20 newtons (input force), which equals 3. This means that for every 1 newton of input force applied, the opener can exert 3 newtons of force on the can.