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A 75.0 kg stunt man jumps from a balcony and falls 26.5 m before colliding with a pile of mattresses. If the mattresses are compressed 1.20 m before he is brought to rest, what is the average force exerted by the mattresses on the stuntman?\
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The nucleus of a helium atom contains two protons. In a simple model of this nucleus, What is the electric potential energy of the two protons
A .230 kg baseball is thrown with a speed of 41 m/s. If the above ball comes to rest in the catcher's mitt in .085 seconds, how much force does the ball apply on the catcher's mitt
a firefighter directs a horizontal stream of water toward a fire at an angle of 40deg measured from the horizontal.
Two blocks are in contact on a frictionless table. A horizontal force F is applied to m1. If m1 = 1.66 kg, m2 = 3.72 kg, and F = 6.25 N, find the magnitude of the force between the two blocks
A pitcher claims he can throw a 0.160-kg baseball with as much momentum as a 2.50-g bullet moving with a speed of 1.50 103 m/s
A 54-kg skater initially at rest throws a 3.0-kg medicine ball horizontally to the left. Determine the acceleration of the ball during the throw
A student is ice fishing in Colorado on a frozen lake over spring break. Find the mass of ice cut out to make the hole
A shopper in a supermarket pushes a cart with a force of 37 N directed at an angle of 25° below the horizontal. What is the net work done on the cart
A resistance R and a 4.7-H inductance are in series across a 60-Hz ac voltage. The voltage across the resistor is 22 V, What is the ac input voltage
A 5cm object is 30 cm in front of the converging lens with a focal length of 15 cm. calculate the image height
A woman flying aerobatics executes a maneuver r = 380m, Determine the value of the centripetal force acting on the woman flying the airplane when at the top of the loop
A huge explosion is heard 77.7 miles away. How long does it take the sound to travel that far
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