Questions: You decide it is time to remove a stump from your front garden. So you dig out around it with a shovel, pry it out using a 2'' × 4° stud balanced on a brick, and haul away in a wheelbarrow. Of those different motions, which would be considered the third-class lever? - The removal of the stump using the wheelbarrow. - The motion using the 2^-1 × 4'' stud to pry it out - The shovel motion of digging around the stump is considered a third-class lever - None of these motions is considered a third-class lever

You decide it is time to remove a stump from your front garden. So you dig out around it with a shovel, pry it out using a 2'' × 4° stud balanced on a brick, and haul away in a wheelbarrow. Of those different motions, which would be considered the third-class lever?
- The removal of the stump using the wheelbarrow.
- The motion using the 2^-1 × 4'' stud to pry it out
- The shovel motion of digging around the stump is considered a third-class lever
- None of these motions is considered a third-class lever

Transcript text: You decide it is time to remove a stump from your front garden. So you dig out around it with a shovel, pry it out using a $2^{\prime \prime} \times 4^{\circ}$ stud balanced on a brick, and haul away in a wheelbarrow. Of those different motions, which would be considered the third-class lever? The removal of the stump using the wheelbarrow. The motion using the $2^{-1} \times 4^{\prime \prime}$ stud to pry it out The shovel motion of digging around the stump is considered a third-class lever None of these motions is considered a third-class lever

Solution

Solution Steps

Step 1: Understanding Lever Classes

Levers are classified into three types based on the relative positions of the fulcrum, effort, and load:

First-class lever: The fulcrum is between the effort and the load (e.g., seesaw).
Second-class lever: The load is between the fulcrum and the effort (e.g., wheelbarrow).
Third-class lever: The effort is between the fulcrum and the load (e.g., tweezers).

Step 2: Analyzing the Given Options

Wheelbarrow: This is a second-class lever because the load (stump) is between the fulcrum (wheel) and the effort (handles).
Stud to Pry: This is likely a first-class lever, as the stud acts like a lever with the brick as the fulcrum, the effort applied on one end, and the load (stump) on the other.
Shovel Motion: When digging, the shovel acts as a third-class lever because the effort is applied between the fulcrum (where the shovel pivots in the ground) and the load (dirt).

Step 3: Identifying the Third-Class Lever

Based on the analysis, the shovel motion of digging around the stump is considered a third-class lever.