20) You\'re carrying a 3.6-m-long, 25 kg pole to a construction site when you de
ID: 1864361 • Letter: 2
Question
20) You're carrying a 3.6-m-long, 25 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. How much force must you exert to keep the pole motionless in a horizontal position? (5 points) Hint: 5 om 16 m 21)) A vendor hangs an 8.0 kg sign in front of his shop with a cable held away from the building by a lightweight pole. The pole is free to pivot about the end where it touches the wall, as shown in Figure. What is the tension in the cable? (5 points) Cable 60r ITTLE SEP F PETSIESExplanation / Answer
20.
Considering equilibrium of torque about left end
W*1.8= F(3.6-0.35)
F= 25*9.8*1.8/(3.6-0.35)
F= 135.692 N
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21.
Considering equilibrium of forces along vertical
T cos (theta) =mg
T =8* 9.8/ cos 60
=156.97N
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