50 cm Q9: How much force must the biceps muscle exert when a 5.0-kg ball is held in the hand (a) with the arm horizontal, and (b) when the arm is at a 45degree angle? The biceps muscle is connected to the forearm by a tendon attached 5.0 cm from the elbow joint. Assume that the mass of forearm and hand together is 2.0 kg and their CG is as shown. FM CG (2.0 kgjg (5.0 kgig 15 cm- (b) 35 cm (aj

50 cm Q9: How much force must the biceps muscle exert when a 5.0-kg ball is held in the hand (a) with the arm horizontal, and (b) when the arm is at a 45degree angle? The biceps muscle is connected to the forearm by a tendon attached 5.0 cm from the elbow joint. Assume that the mass of forearm and hand together is 2.0 kg and their CG is as shown. FM CG (2.0 kgjg (5.0 kgig 15 cm- (b) 35 cm (aj

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

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

See similar textbooks

Similar questions

The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016, determine the force F required to advance the bar at a constant speed.
When a motor is set on a pivoted mount seen below, its weight can be used to maintain tension in the drive belt. When the motor is not running the tensions T1 and T2 are equal. The total mass of the platform and the motor is 100.0 kg, and the diameter of the drive belt pulley is 16.0 cm. when the motor is off, find: (a) the tension in the belt, and (b) the force at the hinged platform support at point C. Assume that the center of mass of the motor plus platform is at the center of the motor.
GOAL Apply the equilibrium conditions to the human body. Humerus PROBLEM A 50.0-N (11-lb) bowling ball is held in a person's hand with the forearm horizontal, as in Fig- ure 8.13a. The biceps muscle is attached 0.030 0 m from the joint, and the ball is 0.350 m from the joint. Find the upward force F exerted by the biceps on the forearm (the ulna) and the downward force R exerted by the humerus on the forearm, acting at the joint. Neglect the weight of the forearm and slight deviation from the vertical of the biceps. 50.0 N -Biceps Ulna 0.030 0 m 50.0 N 0.0300 m R 0.350 m -0.350 m-
A 2x3m plate with a weight of 900 kg is lifted with the help of three cables connectedto each other ww www at the D point located right abovethe center of the slab. Find the forces in the cables. D 3m O TAD =450 kG, TBD =383 kG, TcD= 326 kG )O TAD =350 kG, TBO =333 kG , Tco= 316 kG TAD #400 kG, TBp =313 kG , TCD= 366 kG 1,5 m-1,5 mtim d) TAD 315 kG, TBD =393 kG, TCo 366 kG
A block and sphere are connected by a cord that passes over a pulley as shown. Neglect friction and assume the cord is massless. Take m1 = 2.00 kg, m2 = 7.65 kg, and ? = 49.0°. A triangular structure is oriented such that its base rests upon a horizontal surface, its left side is perpendicular to its base, and its right side forms an incline of angle ?. A pulley is attached to the structure's apex. Two objects are connected by a cord that passes over the pulley. A circular object labeled m1 is attached to the to the left end of the cord and hangs freely. A rectangular object labeled m2 is attached to the end of the cord and rests upon the incline. (a) What are the magnitude of acceleration (in m/s2) of the block and sphere? _____m/s2 (b) What is the tension (in N) in the cord? (Enter the magnitude.) ____N (c) What is the speed (in m/s) of each object 2.25 s after being released from rest? ____m/s (d)What If? If the incline under m2 is rough, what is the minimum value…
A lift (elevator) in a tall building is operated by an electric motor as shown inFigure QB3. The lift car is suspended from a cable that is wrapped around thesheave. The other end of the cable supports a counter-weight.The sheave has a diameter of 550 mm. The counter-weight has a mass of 1750kg and the combined mass of the lift car and passengers is 2000 kg. Theefficiency of the motor is 90%. Air resistance and friction between the cable andthe sheave should be ignored. When the lift car is being raised at a constantspeed of 2.50 m/s, determine the torque generated by the motor answer: 750Nm
A lift (elevator) in a tall building is operated by an electric motor as shown inFigure QB3. The lift car is suspended from a cable that is wrapped around thesheave. The other end of the cable supports a counter-weight.The sheave has a diameter of 550 mm. The counter-weight has a mass of 1750kg and the combined mass of the lift car and passengers is 2000 kg. Theefficiency of the motor is 90%. Air resistance and friction between the cable andthe sheave should be ignored. When the lift car is being raised at a constantspeed of 2.50 m/s, determinei.) The angular velocity of the sheave[25%]ii.) The power output of the motor[25%]iii.) The power input to the motor[25%]iv.) The torque generated by the motor[25%]
A gardener uses a 60-N wheelbarrow to transport a 250-N bag of fertilizer. What force must she exert on each handle? (There are two handles and the force is distributed equally to each of them.) 0.15 m 250 N 60 N -0.7 m- -0.15 m
How do you identify the zero force members acting in a system? Please help me identify the zero force members in this diagram.
A worker leans over and picks up a 150 N box at a distance of 1.0 m from the axis of rotation in her spine. Neglecting the effect of body weight, how much-added force is required of the low back muscles with an average moment arm of 10 cm to stabilize the box in the position shown? Using static equilibrium calculations, how much added force is required of the low back muscles with the moment arm and position of box
A 50 kg pole extends up a wall, making a 60° angle with the wall. The pole is supported by acable attached 3/4 of the way along the pole. This support cable is perpendicular to the wall.A 10 kg sign hangs from the end of the pole. The pole’s center of mass is 1/3 of the way fromthe wall to the end of the pole. (a) What is the tension in the cable?(b) What are the x and y components of the force the wall exerts on the pole?You must include an extended free body diagram showing all forces acting on the pole. Labelthe location on the pole you will use a reference for measuring distances (the “axis of rotation”) at the point where the pole touches the wall. Thank you!
In a hydraulic press, the small cylinder has the diameter of 8 cm while the larger piston has thediameter of 22 cm. If the force of 600 N is applied to the small piston, what is the force on thelarger piston, neglecting friction?