The hook shown in the figure is only capable of resisting 500N vertical net force. Determine the safe value of P in N and theta in degrees. UON 30° 10
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- During the downward portion of a biceps curl the velocity of the dumbbell is held constant. If the dumbbell weighs 50 N what is the internal force produced by the muscles? a. 50 N b. < 50 N c. > 50 N d. need more informationThe figure shows an engine block with a mass of 250 kg suspended by ropes connected to a central ring at A. What is the tension (force) in the AB rope?Determine the angle theta at which the tension in the thread is equal to zero? Please hand write notes.
- A student creates a beam bridge for a project, suspends masses from the bridge, and spans the bridge across two surfaces, as pictured below. What is the best approximation for the normal force applied on the bridge’s surface from PylonA? (A)About 0.8N (B)About 1.2N (C)About 1.4N (D)About 2.0NThe upper leg muscle (quadriceps) exerts a force of 1270 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in Figure 5.43. Find the magnitude and direction of the force exerted by the kneecap on the upper leg bone (the femur).Answer in N Answer in ° (counter-clockwise from an axis directed to the left)The weightless strut in the figure below is not attached to the wall; it is prevented from falling only by friction. (Let w = 375 N, L = 5.05 m and h = 3.10 m. (a) Find the magnitude of the force of friction between the wall and the strut.(b) Find the normal force exerted by the wall on the strut.(c) Find the minimum coefficient of static friction. please solve thank you
- A 175 N sign is supported by two ropes. One rope pulls up and to the right θ1=29.5∘ above the horizontal with a tension T1, and the other rope pulls up and to the left θ2=49.5∘ above the horizontal with a tension T2, as shown in the figure. Find the tensions T1 and T2.a box slides down a ramp with an acceleration of 1.2m/s^2. if the coefficient of firction is 0.3 between the box and the ramp, what is the angle the ramo makes with the horizontal? You can leave your awnser as an equation/expression rather than finding the value.You wish to help the child carry the backpack. Find the magnitude of force you should apply to the backpack with weight 34 lb and the angle to minimize the amount of force the child needs to provide if a is fixed at 20.1°. B = Child B W y α O You X
- Assuming smooth contact surfaces, find the tension T in the cable and the normal surface reactions at pointsA and B. The mass of the bar is 400 kg and its center of gravity is at point G. Use g = 9.80 m/s2.A bag of cement with a mass of 100kg hangs in equilibrium from three wires as shown in the figure . Two of the wires make angles θ1=40 and θ2=30 with the horizontal. Assuming the system is in equilibrium. a. What is the magnitude of tension in string 2What is the shortest length of wire L that can be used to hang the mirror without the wire breaking? (Ignore friction between the mirror and the wall)