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While exercising in a fitness center, a man lies face down on a bench and lifts a weight with one lower leg by contracting the muscles in the back of the upper leg. Find the magnitude of the angular acceleration produced given the mass lifted is 10.5 kg at a distance of 28.0 cm from the knee joint, the moment of inertia of the lower leg is 0.900 kg·m2, the muscle force is 1550 N, and its effective perpendicular lever arm is 3.00 cm.
A converging lens with a focal length of 20 cm and a diverging lens with a focal length of -70 cm are 110 cm apart. Calculate the distance between image and diverging lens
Compute the velocity of the electron assuming that hydrogen is described by the Rutherford-Bohr model
A kingfisher is hovering 30m above a lake when it drops a fish its carrying. What initial speed should it have if it is to reach the fish just before the fish hits the water
The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed. Find out the maximum speed the stone can attain without breaking the string.
question a reflecting telescope has a main mirror with fm 540 mm. if an eyepiece with a magnification of 5 is used
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.3L in the warm store at 76?F. By how much has the volume decreased in liters
q1. a person whose eyes are h 1.64 m above the floor stands l 2.3 m in front of a vertical plane mirror whose bottom
a spring is first stretched 2.0 cm from its unstressed length. it is then stretched an additional 2.4 cm. how does the
The velocity vs. time curve of an object is an increasing straight line. What is the acceleration of the object
In the Bohr model, the electron in H has a circular orbit. For an isolated atom, the only force on the electron is the strictly radial electrical force. Does this violates the uncertainty principle
A ring is fitted loosely (with no friction) around a long, smooth rod of length L = 0.901 m. Determine the radial velocity of the ring as it reaches the moving end of the rod
Calculate the angle between the lines (in degrees). Use the angle in the +y direction from the crossing point. (All distances are in meters.)
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