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If the man falls with his knees and ankles locked, the only cushion for his fall is a 0.480 cm give in the pads of his feet. Calculate the average force exerted on him by the ground in this situation. This average force is sufficient to cause cartilage damage in the joints or to break bones.
A boy ties a small stone to one end of a string and holding the other end, he whirls the stone above his head in a horizontal circle. If the stone has a mass of 0.5 kg, find the centripetal force on the stone
A total charge of 100 coloumbs flows past point A in a circuit in 4 seconds. calculate the current at point A
A bug crawls outward from the center of a compact disc spinning at 160 revolutions per minute. The coefficient of static friction between bug's sticky feet and disc surface is 1.10.How far does the bug get from the center before slipping.
A 3000 flask is initially open while in a room containing air at 1 and 20 . The flask is then closed and immersed in a bath of boiling water. When the air in the flask has reached thermodynamic equilibrium, flask is opened and air is allowed to esc..
Suppose that protons are fired towards the large flat side of a charged conducting plate. How long does it take for the particles to hit the plate
A baseball is hit with a speed of 28.0{\rm m/s} at an angle of 47.0{\rm ^\circ} . It lands on the flat roof of a 14.0{\rm m} -tall nearby building. what horizontal distance does it travel before it lands on the building
A 14.0-m uniform ladder weighing 510 N rests against a frictionless wall. The ladder makes a 63deg angle with the horizontal. what is the coeffecient of static friction between ladder and ground
A projectile is fired at an angle of 55 degrees above the horizontal with an inital speed of 35.0 m/s. What is the magnitude of the horizontal component of the bullet's
An electron is traveling through a region of space in which the electric field is along the +x direction, What is the acceleration of the electron
John takes off for Vega (d ~ 25LY) traveling at 99.99% the speed of light. As soon as he arives, the ship turns around, How old are they when John returns
A student holds a tuning fork oscillating at 201 hz. He walks towards a wall at a constant speed of 1.38 m/s. What beat frequency does he observe between the tuning fork and its echo
in a young's double slit experiment two rays of monochromatic light emerge from the slits and meet at a point on a distant screen. what is the wavelength in mm of the monochromatic light
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