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A player uses a hockey stick to increase the speed of a0.200kg hockey puck by 6 m/s in 2 seconds.
a) How much did the hockey puck accelerate?
b) How much force was exerted on the puck?
c) how much force did the puck exert on the hockeystick?
The mass of the Sikorksky UH-60A helicopter is 9300kg. It takes off vertically at t=0. How fast is the helicopter rising 3 seconds after it takes off
question1calculates the average velocity in following two cases.a you walk 73.2m at the speed of 1.22ms and then run
A satellite of mass 4500 kg orbits the Earth(mass = 6.0 x 1024 kg) and has a period of 5800 s. Find the altitude of the satellite
An electron has an initial velocity of 8.00 106 m/s in a uniform 7.00 105 N/C strength electric field. How long does it take the electron to come to rest
An emf of 10 V is connected to a series RC circuitconsisting of a resistor of 1.3 x 106 Ω and a capacitor of2.9 µF. Find the time required for the charge on the capacitor to reach 89% of its final value.
How much heat must be removed from 0.40 kg of water at 0 degrees C to make ice cubes at 0 degrees C?
A rocket that starts at rest with mass M ejects exhaust at a given speed u. What is the mass when its energy is maximum
A photon having E = 15.2 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon, At which angle will the electron scatter
A juggler throws a ball straight up into the air and it takes 4.20 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
A current of 3.50 A is carried by a copper wire of radius 0.87 mm. what is the drift speed of the conduction electrons
In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, What should be the radius of curvature of the cornea
A worker on scaffolding 65 ft above the ground needs to lift a 340 lb bucket of cement from ground to a point 30 feet above the ground by pulling on a rope weighing 5 lb/ft. How much work is required.
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