Which of the following simple machines is a second class lever?
Question 1 Report
Which of the following simple machines is a second class lever?
Answer Details
A second class lever is a simple machine where the load is situated between the effort and the fulcrum. In other words, the load is farther away from the fulcrum than the effort is.
Out of the options given, the wheelbarrow is an example of a second class lever. In a wheelbarrow, the load (the materials being carried) is placed on the front of the wheelbarrow, which is the load arm. The effort is applied by the person pushing the handles at the back of the wheelbarrow, which is the effort arm. The fulcrum is the wheel at the center of the wheelbarrow.
When the person pushes down on the handles, the wheelbarrow pivots around the fulcrum, which lifts the load off the ground. The farther away the load is from the fulcrum, the easier it is to lift because the effort arm is longer than the load arm.
Therefore, the correct answer to the question is the wheelbarrow.
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