The Expert TA u 34my.theexpertta.com/Common/Take (10%) Problem 8: Consider a whe

Question

The Expert TA u 34my.theexpertta.com/Common/Take (10%) Problem 8: Consider a wheelbarrow, such as the one in the figure. Free-body diagram e co & 33% Part (a) What isthe mechanical advantage of a wheelbarow if the centerofgravity ofthe wheetanow and its load has a perpendicular lever arm of 5.35 cm, while the hands have a perpendicular lever arm of 1.09 m MA = Grade Sumary tions 0% sino 7 8 9 cos0 cotanO asin acos atano acotanOsinh0 cosho tanh cotanho Degrees Radians Feedhork: 1 dedaction per feedback Hints: fra 0% deduction Hints remaining: 33 % Part (b) what upward force in newtons should you exert to support the wheelbarrow and is load if their combined mass is 550 kg? 33% Part (c) what force in newtons does the wheel exert on the ground?

Explanation / Answer

a) mechanical advantage of wheel barrow = li / lo

MA = 1.09 / 0.0535

= 20.37

b) upward force = m g / MA

= 55 * 9.8 / 20.37

upward force = 26.4 N

c) N = F (MA - 1)

= 26.4 (20.37 - 1)

force exerted by wheel = 512 N

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