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What is the magnitude of the acceleration of a falling sky diver (mass 62.5kg including parachute) who has opened her parachute, when the upward force on the parachute (air resistance) is equal to one fourth of her weight?
A projectile is fired from ground at an angle 60 degrees above horizontal to hit a target on the wall, which is 25.0 m away. Find the initial speed of the projectile
In proton-beam therapy, a high-energy beam of protons is fired at a tumor, What is the total charge of the protons that must be fired at the tumor to deposit the required energy
The magnitude of F is 306 newtons and it points at 93o measured counter clockwise from the positive x-axis. What is the y component (in newtons) of F.
A model rocket fired vertically from the ground ascends with a vertical acceleration of 3.2 m/s2 for 5.2 s. What is the maximum altitude reached
You are in a hot-air balloon that, relative to the ground, has a velocity of 4.65 m/s in a direction due east. find direction of the hawk's velocity relative to the ground
A square uniform raft, 20m by 20m , of mass 7100kg , is used as a ferryboat. determine the CM of the loaded ferryboat
A wire cable is rated to have a maximum power of 308 W. If the potential difference is 110 V, what maximum current can the wire handle
A 64 woman stands on a very light, rigid board that rests on the bathroom scale at each end. 1.5 m left of her and 2.0m total. what is the reading on each of the scales.
A certain heat engine does 8.5 kJ of work and dissipates 8.50 kJ of waste heat in a cyclical process. What was the heat input to this engine
Consider a capacitor created when two identical conducting plates are placed parallel and close to each in other in vacuum, what is the magnitude of the electrostatic force between the charged plates, Is the force attractive or repulsive
A cockroach of mass m lies on the rim of a uniform disk of mass 6 m that can rotate freely about its center like a merry-go-round. find the angular velocity of the cockroach-disk system
The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 10.00 radius of curvature. What is the car's speed at the bottom of dip? What is the car's speed at the bottom of the dip?
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