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A skier is gliding along at 4.72 m/s on horizontal, frictionless snow. He suddenly starts down a 19.2° incline. His speed at the bottom is 27.8 m/s. What is the length of the incline?
A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 6.65 cm. The hose ends with a nozzle of diameter 2.50 cm. A rubber stopper is inserted into the nozzl..
A flywheel having constant angular acceleration requires 4.40s to rotate through 169rad . Its angular velocity at the end of this time is 110rad/s. find the angular acceleration of the flywheel
Jane and Jon, with masses of 50 kg and 60kg, respectively,stand on a frictionless surface 10m apart, What is JOhn's acceleration
A chair of mass 13.0kg is sitting on the horizontal floor; the floor is not frictionless, Use Newton's laws to calculate the normal force that the floor exerts on the chair
A steel piano wire 1.35 m long has a cross- sectional area of 0.00751 cm2. When under a tension of 68.9 N, how much does it stretch
A bicyclist starts from rest at the top of a 20-m hill and rolls down it without pedaling. find the bicyclist's speed at the bottom of the hill
A 5.63 kg crate slides on a horizontal surface. The coefficient of kinetic friction between the surface and the crate is 0.383. estimate the magnitude of the external force acting on the crate
A pump is required to lift 750 liters of water per minute from a well 17.0m deep and eject it with a speed of 19.0, How much work per minute does the pump do
Two equal but oppositely-charged particles are placed 1.00 m away from each other. determine the charge on each particle
A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp that is inclined at an angle of 15.0° above the horizontal. What was the truck's initial speed
If both the ring and the rod are warmed together, what temperature must they both reach so that the ring barely slips over the rod.
A rail gun accelerates a projectile from rest by using the magnetic force on a current-carrying wire. The wire has radius r = 4.3 10-4 m and is made of copper having a density of ? = 8960 kg/m3. Calculate the final speed of the wire as it leaves th..
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