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Draw free body diagrams for the following, that is all.
a) A 784.8 N weightlifter is standing holding a bar weighing 981 N directly over his head (The unknown external force you should include in the FBD is the GRF acting on the weightlifter's feet).
b) An individual is holding her right leg (tibia and fibula) in 20° (clockwise (CW) with respect a right horizontal passing through her knee joint) of knee flexion during the performance of a leg extension exercise with a 133.5 N cuff weight attached to her ankle. The cuff weight is located 39 cm from the knee joint. The weight of the individual's combined leg and foot is 40.7 N and the COM of the combined leg and foot is located 0.236 m from the knee joint. The net muscle force of the quadriceps acting to maintain the current position is 1168 N. The quadriceps muscle force is located 17.4 cm from the knee joint and has a line of action 15° CW with respect to the leg. The unknown external force(s) is/are the net joint reaction forces acting on her knee joint in this position.
c) A rightward force applied to a book in order to move it across a desk at constant velocity.
Water (? = 1000 kg/m3) is flowing smoothly through a pipe of diameter of 5.0 cm at a speed of 0.25 m/s. Find the pressure in the upper segment of the pipe
A 56.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 1.22×10-7 ?m, What will be the diameter of the wire
A violin string has a length of 0.350m and is tuned to concertG, with fg=392 Hz. Where must the violinst place her finger to playconcert A, with fa=440 Hz? If this position is to remain correct toone-half the width of a finger (that is, to within ..
A 1000 kg rocket sled at rest on level frictionless rails is loadedwith 25kg of propellent. What average force is experienced by the rocket during the burn
He pulls on a rope that is fastened to the platform and runs over a pulley on the ceiling. Illustrate with what force does he have to pull in order to give himself and the platform an upward acceleration of 1.0 m/s^2?
Tthe center C' of the smaller circle is a distance .80R from the center C of the larger circle. illustrate what is the position of the center of mass of the plate?
A candle is 36.0cm from a concave mirror with focal length 15.0cm and on the mirror axis. How do the image and object sizes compare
the most common use for the nand latch is as a switch debouncer. what is switch bounce and why do we need to eliminate
a spherical void of radius r has cut inside the sphere, find the electric field inside the void if its center is displaced by vector R
A person with a mass of 52 kg runs with a speed of 6.8 m/s jumps onto the outer rim of a merry-go-round. What is the mass (in kg) of the merry-go-round
Two particles of masses m and 3m are moving toward each other along the x-axis with the same speed v. Determine the final speed of the heavier object
For the neutral chlorine atom 35,17 CL, determine the mass number and number of protons
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