A weightlifter is holding a biceps curl with a 300 Nbarbell at 90∘ of elbow flexion. The moment arm of the barbell about the elbow joint is 50 cm. The moment arm of the elbow flexor muscles is 6 cm. The mass of the forearm (everything from the elbow to the finger tips) is 15 kg, with a moment arm of 25 cmabout the elbow joint. How much force must be produced by these museles to hold the 300 Nbarbell in static equilibrium? Be sure show all your work.

Q: Determine the forces in members BD, DE and EG.

A: A graphical representation of all the forces and moments, including magnitude and direction, acting…

Q: A mother leans horizontally over the crib to lift her 18.8 kg baby. The moment arm of the baby about…

A:

Q: At the gym, you notice a girl doing a “plank.” In this exercise, she holds the position shown…

A: ...

Q: Even when the head is held erect, as shown in the figure, its center of mass is not directly over…

A:

Q: 77-kg man stands on his toes by exerting an upward force through the Achilles tendon, as in the…

A:

Q: A met stk hs a mase f 0.21 kg and bnon at s.cobtWhea ml chans upended brom one end, the balaor pont…

A:

Q: When a catcher in a baseball game catches a fast ball, he does not hold his arms rigid, but relaxes…

A: Given:-  When a catcher in a baseball game catches a fastball, he does not hold his arms rigid but…

Q: One person was doing a knee extensor muscle training, he used a dumbbell (mass = 10.2 kg) strapped…

A: The objective of this question is to calculate the force that the knee extensor muscle must produce…

Q: A vehicle is accelerating from rest, on snow and ice. If the vehicle has a weight of 2100 lbs with…

A: mass of vehicle m=2100 lbf=9341.265 N let say acceleration of vehicle =a then force on vehicle F=ma

Q: To balance a 35.5-kg automobile tire and wheel, a mechanicmust place a 50.2-g lead weight 25.0 cm…

A: The distance from the center of the wheel to its center of mass is x.   The mass of the automobile…

Q: O A Elniform horizontal bean 3.om long and oeighing 3.0x. 1ON is attached to auoall by Pin…

A: Given data: Weight of beam, WB=3×102 N Weight of the person, Wp=6×102 N The distance of the person…

Q: A rope is wound around a shaft 10 cm in diameter. If a pull of 500 N is exerted on the rope, what…

A: Given: Diameter of shaft, d=10 cm=0.1 m Radius of the shaft, r=0.05 m Force, F=500 N   Formula: The…

Q: D CU... t ona- t Pool ment..... 25,551 80 3 5. A 1.90 kg box rests on a plank that is inclined at an…

A: Given data :  Mass of box m = 1.90 kg  Force constant of spring k = 25 N/m  Static friction between…

Q: To pull with a force F166 N on the scale as shown, what should the tension Min your biceps muscle be…

A: Given: The force is 166 N.             The distance h is 0.25 m.             The distance from the…

Q: An 2992 N beam is loaded with two file cabinets (labeled 1 & 3) and hoisted at a constant velocity…

A:

Q: The maximum mass mm that a person can hold in a hand when the arm is positioned with a 105∘∘ angle…

A:

Q: Do both short questions

A:

Q: the horizontal arm is composed of 3 parts. the upper arm weight is 17.5N and the distance from the…

A:

Q: A pendulum with a 500 g bob is pulled to an angle 9.00 to the left. What is the restoring force?…

A: Given that:Mass of pendulum, m=500 g=500×10-3 kgAngle θ=9.0° to the left

Q: (a) What force, F, (force of reaction), should the woman in the Figure below exert on the floor with…

A: Step 1: Step 2:

Q: The figure shows an outstretched arm (0.61 m in length) that is parallel to the floor. The arm is…

A:

Q: One person was doing a knee extensor muscle training, he used a dumbbell (mass = 10.2 kg) strapped…

A: Ans is in imageExplanation:Step 1: Step 2: Step 3: Step 4:

Q: Even when the head is held erect, as shown in the figure, its center of mass is not directly over…

A:

Q: Show the FBD of the beam with complete and correct labels of all forces and moment arms.(b) How much…

A:

Q: A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots…

A:

Q: 42 kg child sits on a bathroom scale while riding a Ferris wheel. The child has a stopwatch and…

A:

Q: You are helping a patient to strengthen their hip flexors. Your patient is performing a hip flexion…

A: The mass of the thigh is: The mass of the shank is:  The mass of the foot is: The angle of the leg…

Q: Figure 4 100 g 7. Place a clamp with a hanging mass of 300 g at the 30.0 cm mark of the half-meter…

A:

Q: ,how many seconds does it take to come to rest?

A:

Q: An architecture student working at a drafting table requires some muscle action in order to support…

A: Concept In the stationary state, the net force acting on the head at the CG of the head must be…

Q: The diagram below shows a light plank balanced on two supports, A and B. Weights of 50 N, 25 N and…

A: Given that: The plank is massless.

Q: Determine the additional mass required for stable equilibrium. Meter stick: Xcm = 50.0 cm, m = 150.0…

A: The additional masa required for stable equilibrium is 208.5gm

Q: cat is balanced on the edge of a see-saw. The plank of the see-saw is 1m long, and the wedge is…

A:

Q: pls help me my monkey brain cant keep up

A:

Q: Question: A 4.0 m long and balanced plank rests shifted leftwards from its center of mass a distance…

A:

Q: The following figure represents a bicep curl maneuver where the center of mass (CoM) of a 23 kg…

A: To find the required magnitude of the resultant joint reaction force (JRF) at the elbow joint in…

Q: A 72.0 kg weightlifter doing armraises holds a 7.50 kg weight.Her arm pivots around theelbow joint,…

A: Given:- Weightlifter weight =72 Kg                     weight= 7.50 Kg                angle (θ) =40∘…

Q: In the figure to the right, spherical masses are suspended from strings of negligible mass in…

A: The scale reads what is creating a force on the scale. If the system under acceleration then the…