Mini-Quiz: Mechanical Advantage in Machines

1. What force mechanical advantage is needed to lift a 100 kg weight 3 meters?

   100 x 3 = 300Sorry, not correct. Try another button. It depends on whether you use a lever or a pulleyGood try, but not right. Select another answer. You need to know the amount of effort force that is applied to determine the force mechanical advantageThat is correct. You understand mechanical advantage.

2. What is the distance mechanical advantage if you must apply a 10 lb effort to move a 5 lb weight?

   2, since the force mechanical advantage is 5/10 and MAd = 1/MAFCorrect. You are becoming a Champion. You can't tell, because you don't have any distances mentionedOops! Wrong answer. Re-read the question and try again. 50 = 10 x 5Sorry, not correct. Try another button.

3. What happens when you change gears on a 10-speed bicycle?

   You multiply its speed by 10Good try, but not right. Select another answer. You change the bicycle's speed mechanical advantageThat is correct. You understand mechanical advantage. The bicycle's speed mechanical advantage remains the same, but it goes fasterOops! Wrong answer. Re-read the question and try again.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.