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CHAPTER 4
PROBLEM 4.1
A gardener uses a 60-N wheelbarrow to transport a 250-N bag
of fertilizer. What force must she exert on each handle?
PROBLEM 4.2
The gardener of Problem 4.1 wishes to transport a second
250-N bag of fertilizer at the same time as the first one.
Determine the maximum allowable horizontal distance from
the axle A of the wheelbarrow to the center of gravity of the
second bag if she can hold only 75 N with each arm.
PROBLEM 4.1 A gardener uses a 60-N wheelbarrow to
transport a 250-N bag of fertilizer. What force must she exert on
each handle?
PROBLEM 4.3
A 2100-lb tractor is used to lift 900 lb of gravel.
Determine the reaction at each of the two (a) rear wheels
A, (b) front wheels B.
PROBLEM 4.4
For the beam and loading shown, determine (a) the reaction at A,
(b) the tension in cable BC.
PROBLEM 4.5
A load of lumber weighing 25 kNW is being raised by a
mobile crane. The weight of the boom ABC and the
combined weight of the truck and driver are as shown.
Determine the reaction at each of the two (a) front wheels
H, (b) rear wheels K.
PROBLEM 4.6
A load of lumber weighing 25 kNW is being raised as
shown by a mobile crane. Knowing that the tension is 25
kN in all portions of cable AEF and that the weight of boom
ABC is 3 kN, determine (a) the tension in rod CD, (b) the
reaction at pin B.
PROBLEM 4.7
A T-shaped bracket supports the four loads shown. Determine the
reactions at A and B (a) if
10 in.,a
(b) if
7 in.a
PROBLEM 4.8
For the bracket and loading of Problem 4.7, determine the
smallest distance a if the bracket is not to move.
PROBLEM 4.7 A T-shaped bracket supports the four loads
shown. Determine the reactions at A and B (a) if
10 in.,a
(b) if
7 in.a
