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(a) Find what is the maximum frictional force in the knee joint of a person who supports 66 kilogram of her mass on that knee?
(b) During strenuous exercise it is possible to exert forces to the joints that are easily ten times greater than the weight being supported. Find what is the maximum force of friction under such conditions? The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further pain and damage.
A particle is constrained to stay on a frictionless circular ring of radius R. Solve the appropriate Hamiltionian for this system, write the normalized wavefunction, and find the energy eigenvalues.
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 210 mi/h in 3.00 s. (a) Find the average acceleration of the plane. m/s2 (b) Assuming the acceleration is constant, find the distance the plan..
A circular surface with a radius of 0.057 m is exposed to a uniformelectric field of magnitude 1.87 x 104 N/C. The electricflux through the surface is 69 N·m2/C. What is the angle between the direction of the electric field and the enormal to the sur..
A microscope by a tube length of 200 achieves a total magnification of with a objective and a eyepiece. The microscope is focused for viewing by a relaxed eye. How far is the sample from the objective lens?
a silver dollar of mass 200gm, and diameter 8cm, has a small hole punched through it at 2 cm from the center. the coin is initially at rest in a vertical plain with the hole directly under the center, what is the angular velocity of the coin at its..
a soccer player takes a penalty kick 11.0m from goal. to score she has to shoot the ball under the 2.44m high cross
What is the Lens Equation? What do o, i and f stand for in the equation and what are the five parts of the Optical Bench used in this experiment? Briefly describe what each part does.
A 14kg projectile is launched at 380m/s at a 55 (degrees) angle to the horizontal. At the peak of its trajectory it collides with a second projectile moving horizontally, in the opposite direction, at 140m/s . The two stick together and land 9.8km ho..
A horizontal force of magnitude 35N pushes a block of mass 4.0 Kg across a floor where the coefficient of kinetic friction is 0.6. What is the increase of kinetic energy of the block?
Calculate the position that a lens should be placed in order to achieve the maximum magnification. what is the maximal magnification possible
a student calculates the unknown liquid to have a density of 0.87 gcm3. if the class average for the density of the
A coin placed on a turntable rotating at 33.0 rev/min will stay there if its center is placed no further than 7.2 cm from the axis of rotation. What is the maximum distance the center of the coin can be placed from the axis
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