Question

You're carrying a 3.6-m-long, 21 kg pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 cm from its tip. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution. Part A Part complete How much force must you exert to keep the pole motionless in a horizontal position? Express your answer in newtons. F = 114 N Previous Answers

Answer 1

Answer:

Reaction = 114.09 N

Explanation:

Since the pole is at rest we can use equations of equlibrium

Taking Moments of forces about the fence as shown in the figure below  we get

$R=\frac{1}{3.6-0.35}[21\times \times 9.81\times \frac{3.6}{2}]\\\\R=144.09N$