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A 72.4 man steps off a platform 3.02 above the ground. He keeps his legs straight as he falls, but at the moment his feet touch the ground his knees begin to bend, and, treated as a particle, he moves an additional 0.620 before coming to rest.
calculate the force the ground exerts on him while he is slowing down. Express this force in newtons.
What is the magnitude of the reaction force to the force.
A railroad car is released from a locomotive on an incline. what negative acceleration must it produce to bring the car to rest
A container at 25°C holds 0.50 moles of helium at a pressure of 2.5 atm. What is the volume of the container
A 3000-kg Ferris wheel accelerates from rest to an angular speed of 0.17rad/s in 11s, What is the net torque on the wheel
Two point charges are separated by d= 10 cm and have charges of q1= +2(mu)C and q2= -2 (mu)C, respectively, What is the magnitude of the electric force between the two charges
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20×10^ 6N , one at an angle 19.0 ? west of north, What is the total work done by the two tugboats on the supertanker
A cockroach of mass m lies on the rim of a uniform disk of mass 8 m that can rotate freely about its center like a merry-go-round. determine the angular velocity of the cockroach-disk system
In a certain RLC circuit, the RMS current is 6.51 A, the RMS voltage is 223 V, and the current leads the voltage by 50.5°. What is the total resistance of the circuit
A 17cm radius air duct is used to replenish the air of a room 7.1 m x 5.2 m x 4.5 m every 16 min. How fast does air flow in the duct
The speed of a light wave in a certain transparent material is 0.501 times its speed in vacuum, what is its wavelength in nanometers
A ball is shot from the top of a building with an initial velocity of 20m/s at an angle ? = 42? above the horizontal. What are the x and y components of the initial velocity
A charged particle (m = 8.05 g, q = - 7.68 µC) localized at point A has a speed of 0.88 m/s. What is the kinetic energy of the particle when reach B
The aorta is a major artery, rising upward from the left ventricle of the heart and curving down to carry blood to the abdomen, what is the magnitude (in m/s2) of the blood's centripetal acceleration
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