2) As the foot contacts the ground, a ground reaction force of 200 Nat 55* relative to the horizontal is generated. This foot 22 cm in length and is divided at the ankle, 6cm from the edge of the heel. For this question. assume: - The foot is a single rigid beam, and the ankle is a single axis joint - The mass of the foot is 6 kg, and the center of mass bisects the foot - The foot is at a 45° angle to the horizontal a) Draw a free body diagram of the foot at heel contact b) Solve for the joint reaction force at the ankle c) Solve for the moment at the ankle

2) As the foot contacts the ground, a ground reaction force of 200 Nat 55* relative to the horizontal is generated. This foot 22 cm in length and is divided at the ankle, 6cm from the edge of the heel. For this question. assume: - The foot is a single rigid beam, and the ankle is a single axis joint - The mass of the foot is 6 kg, and the center of mass bisects the foot - The foot is at a 45° angle to the horizontal a) Draw a free body diagram of the foot at heel contact b) Solve for the joint reaction force at the ankle c) Solve for the moment at the ankle

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter4: Coplanar Equilibrium Analysis

Section: Chapter Questions

Problem 4.124P: The automobile, with center of gravity at G, is parked on an 18 slope with its brakes off. Determine...

See similar textbooks

Similar questions

The homogeneous bar AB weighs 25 lb. Determine the magnitudes of the forces acting on the bar at A and B. Neglect friction.
The automobile, with center of gravity at G, is parked on an 18 slope with its brakes off. Determine the height h of the smallest curb that will prevent the automobile from rolling down the plane.
The uniform 240-lb bar AB is held in the position shown by the cable AC. Compute the tension in the cable.
Find the horizontal force , P required to turn the wheel weighing 500 over the block 10cm high if radius of the wheel is 25 cm
The quadriceps tendon attaches to the tibia at a 30°angle 4 cm from the joint center at the knee. When an 80 N weight is attached to the ankle 28 cm from the knee joint, how much force is required of the quadriceps to maintain the leg in a horizontal position? What is the magnitude and direction of the reaction force exerted by the femur on the tibia? (Neglect the weight of the leg and the action of other muscles.)
With the elbow flexed 30 degrees, the moment arm of the biceps is equal to 10 mm. Solve for the force exerted by the biceps given the following assumptions: —the biceps is the only muscle active —the center of mass of the forearm is located 200 mm from the elbow center of rotation —the mass of the forearm is 2 kg
A hydraulic crane of total mass (including the mass of the boom) 53O0kg supports a load of 800kg. The boom mass 500kg is 7m long and makes an angle of 50 degrees with the horizontal. The boom's center of the boom length. Also assume that the center of mass of the crane excluding the boom acts at the middle of the outrigger jacks that are 4m apart. Draw the FBD of the crane and boom. Find the reaction force at the rear outrigger jack (Nr) and at the front (Nf) for the system to be in equilibrium. Assume the ground is friction less. 7m 1m
Equilibrium of Concurrent Force System. The piston of a reciprocating engine exerts a force of 175 kN on the crosshead when the crank is 45° (angle B) past TDC. If the stroke of the piston is 800 mm and the length of the connecting rod is 1.80 m, find the guide force and the force in the connecting rod. Hint: 1=½ stroke; Angle o may be solved using Sine Law in AACO. K= Compressive Force in the connecting Rod E= Piston Effort 70 120 F, = Guide Force Fig. P-1 Fig. P-2 a Tools: EF cos0=0; F sin .=0. R = Ev)* + (E#): ; R 771 =- : tane = sin A sin B sin C
The wheels, axle, and handles of a wheelbarrow W=62N. The load chamber and its contents weigh Wl=575N. The drawing chose leave to Forsyth and different wheelbarrow designs to support the wheelbarrow and equilibrium the man's hands apply a force to the handles that is directly vertically upward. consider the rotational axis at the point where the tire contacts the ground, directed perpendicular to the plane of the paper. Find the magnitude of the Man's force for both designs
The figure shows the Russel fracture traction device and a mechanical model of the leg. The leg is held in balance in the position indicated by the two weights attached to the two cables. The combined weight of the leg and cast is W=180 N. The horizontal distance between points A and B where the cables are attached to the leg is L=100 cm and the vertical distance is d=5 cm. Point C is the center of gravity of the cast and leg at three quarters of the L measured from point A (3L/4= 75 cm). The angle that cable 2 makes with the horizontal is measured as β=30°. Accordingly, in order for the leg to remain in balance in the shown position; a) Find the tensile force T1 in cable 1. (Write your result in N) Answerb) Find the tensile force T2 in cable 2. (Write your result in N) Answerc) Find the angle α of cable 1 with the horizontal. Response
The lumbar portion of the human spine supports the entire weight of the upper torso and the force load imposed on it. We consider here the disk (shaded red) between the lowest vertebra of the lumbar region (L5) and the uppermost vertebra of the sacrum re- gion. (a) For the case L 0, determine the com- pressive force C and the shear force S supported by this disk in terms of the body weight W. The weight W, of the upper torso (above the disk in question) is 68% of the total body weight W and acts at G,. The vertical force F which the rectus muscles of the back 25 mm G1 W L3 L4 L5 G2 4r exert on the upper torso acts as shown in the figure. (b) Repeat for the case when the person holds a weight of magnitude L W/3 as shown. State any assumptions. F Sacrum 300 mm \50 mm
A beam 3m long has a weight of 200N at one end and another weight of 80N at the other end. The weight of the beam itself is negligible. (a) Design the appropriate force arrangement or system (b) Find the balance point of the beam.