A patient rehabilitating a knee injury performs knee extension exercises wearing a 20 N ankle weight. Calculate the amount of torque generated at the knee by the weight boot for four positions, given a distance of 0.5 m between the weight’s center of gravity and the knee joint center.At θ= 30°

The large quadriceps muscle in the upper leg terminates at its lower end in a tendon attached to the upper end of the tibia (see Figure a). The forces on the lower leg when the leg is extended are modeled as in Figure b, where T is the force of tension in the tendon, w is the force of gravity acting on the lower leg, and F is the force of gravity acting on the foot. Find T when the tendon is at an angle of 25.0° with the tibia, assuming that w = 31.0 N, F = 10.8 N, and the leg is extended at an angle 𝜃 of 40.0° with the vertical. Assume that the center of gravity of the lower leg is at its center and that the tendon attaches to the lower leg at a point one-fifth of the way down the leg. (Give the magnitude.)Figure (a) depicts the leg of a skeleton. The upper leg is horizontal and the lower leg extends down and right. Quadriceps run along the top of the upper leg and connect to the tibia on the lower leg via a tendon. The foot is shown extending to the right at the base of the leg.Figure (b) is a force diagram of figure (a) where the leg is represented by two rods. The right end of a horizontal rod connects to a second rod that extends down and right at an acute angle 𝜃 from the vertical. Three forces act on the second rod.A force vector T acts up and left on the second rod a short distance down from the connection point at an acute angle 25.0° above the line of the rod.A force vector w acts vertically downwards on the center of the second rod.A force vector F acts vertically downwards on the bottom end of the second rod. N

3- Calculate the change in length of the upper leg bone (the femur)when a 70.0 kg man supports 62.0 kg of his mass on it, assuming thebone to be equivalent to a uniform rod that is 40.0 cm long and 2.00cm in radius, and young modulus 9x109 N/m2

The figure shows a person's foot. In that figure, the Achilles tendon exerts a force of magnitude F = 964 N. What is the magnitude of the torque that this force produces about the ankle joint?

If the biceps brachii, attaching to the radius 2.5 cm from the elbow joint produces 250 N of tension perpendicular to the bone, and the triceps brachii attaching 3 cm away from the elbow joint exerts 200 N of tension perpendicular to the bone how much net torque is present at the joint?Question 23Select one:a.0.25 Nm flexionb.0.25 Nm extensionc.No movement at the jointd.2.5 Nm flexione.2.5 Nm extension

The hamstrings pull on the tibia with a force of 510 N at 30° to the bone; that is the angle between the force vector and tibia is 30°. The distance along the tibia from the knee joint center to the tendon insertion is 3.5 cm. What is the magnitude of the force component that is parallel to the tibia?