Remembering
b. If using a crowbar to lift a tree stump, then the tree stump is called the effort c. When using the claw of a hammer to pull a nail out of a piece of wood, the hammer acts as a force multiplier. 4. Recall which class of lever multiplies speed. |
4. Identify the following as first, second or third class levers.
a. Load positioned between the fulcrum and the effort b. Effort |
Understanding
b. A tennis player serving a ball will toss it into the air and reach upwards to hit the ball. Explain how this increases the speed of their serve. 3. The nutcracker illustrated in figure 8.1.10 is a force multiplier. Describe a way the design of this nutcracker could be changed to give it a greater mechanical advantage |