Question

question #6 a wheelbarrow has an output distance that measures 0.25 m from the loads center of mass to the wheel. the input distance measures 1.25 m from the handles to the wheel. what is the mechanical advantage of the wheelbarrow? 0.2 1.5 0.3125 5.0 question #7 the mechanical advantage of a ramp is 3. what amount of force is needed to push a box weighing 225 n up the ramp? 225 n 75 n 675 n 0.013 n

Explanation:

Step1: Recall mechanical - advantage formula for wheelbarrow

The formula for the mechanical advantage (MA) of a wheel - barrow is $MA=\frac{\text{input distance}}{\text{output distance}}$.

Step2: Identify input and output distances

The input distance $d_{i}=1.25$ m and the output distance $d_{o}=0.25$ m.

Step3: Calculate mechanical advantage

$MA = \frac{d_{i}}{d_{o}}=\frac{1.25}{0.25}=5$

Step1: Recall mechanical - advantage formula for ramp

The formula for mechanical advantage (MA) of a ramp is $MA=\frac{\text{load force}}{\text{effort force}}$, or $MA=\frac{F_{L}}{F_{E}}$, and we can re - arrange it to solve for the effort force $F_{E}=\frac{F_{L}}{MA}$.

Step2: Identify load force and mechanical advantage

The load force $F_{L} = 225$ N and the mechanical advantage $MA = 3$.

Step3: Calculate effort force

$F_{E}=\frac{F_{L}}{MA}=\frac{225}{3}=75$ N

Answer:

D. 5.0