Statics: Systems in Equilibrium 95 (a) Determine the tension (T) in the cable De

Question

Statics: Systems in Equilibrium 95 (a) Determine the tension (T) in the cable Determine the magnitude of the reaction force (RA) at point A angle 65° with the horizontal. point A when the cable makes an angle = 65° with the (c) Determine the tension (Ti) in the cable when it makes an (d) Determine change in the magnitude of the reaction force at horizontal. 615.7 N; (cT 634.8 N; Answers: (a) T- 817.2 N; (b) RA (d) 44.6% decrease T1 Problem 4.6 Using two different cable-pulley arrangements shown in Fig. 4.53, a block of weight W is elevated to a certain height. For each system, determine how much force is applied to the person holding the cable Fig. 4.53 Problems 4.6 and 4.7 Answers: T1= W/2 T2=W/4 Problem 4.7 As illustrated in Fig. 4.53b, considera is trying to elevate a load to a certain height by using a cable- pulley arrangement. If the force applied by the person on the cable is T 65 N, determine the mass of the load person who

Explanation / Answer

4.6)

for the pulley attached to weight Was the net force is Zero

2 * T1 - W = 0

T1 = W/2

the tension T1 is W/2

fig B)

for the lowest pulley tension in the attached string is T3

2 * T3 - W = 0

T3 = W/2

Now, for the middle pulley

2 * T2 - T3 = 0

T2 = W/4

the tension T2 is W/4

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