The maximum load that can be lifted by a wheelbarrow, with a given efficiency of 85% and a velocity ratio of 4, is calculated to be 340 Newtons, assuming the applied effort is 100 N.
To calculate the maximum load that can be lifted using a wheelbarrow given its efficiency and velocity ratio, first, we need to determine the mechanical advantage (MA) using the formula:
Efficiency = MA / VR x 100%
Since the efficiency of the system is given as 85% (0.85 in decimal form) and the velocity ratio (VR) is 4:
MA = Efficiency x VR
MA = 0.85 x 4
MA = 3.4
This represents the ideal mechanical advantage without any losses due to friction. Now, to find the load that the wheelbarrow can lift, use the formula:
MA = Load / Effort
And since we are solving for the Load and we know the Effort is 100 N:
Load = MA x Effort
Load = 3.4 x 100 N
Load = 340 N
Therefore, the maximum load that can be lifted by the wheelbarrow, when it is 85% efficient and the effort applied is 100 N, is 340 Newtons.