Question

1. an axe is used to chop down a tree 10 cm wide. the axe must be moved 80 cm to accomplish this task. what is the speed ratio of the axe?

sr=0.12
9/140
10/4=60
10/80=0.12

Explanation:

Step1: Recall Speed Ratio Formula

Speed Ratio (SR) for a machine (like an axe here, acting as a wedge) is given by the ratio of the distance moved by the effort (axe) to the distance moved by the load (tree being cut). The formula is \( SR=\frac{\text{Distance moved by effort}}{\text{Distance moved by load}} \).

Step2: Identify Distances

Distance moved by effort (axe) = 80 cm.
Distance moved by load (tree) = 10 cm.

Step3: Calculate Speed Ratio

Substitute into the formula: \( SR = \frac{80}{10}=8 \).

Answer:

8