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Q. A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 8.4 m/s. If the coefficient of friction between the sled's runners and snow is 0.040 and the boy and sled together weigh 700 N, how far does the sled travel on the level surface before coming to rest?
Q. what are the magnitudes of (a) the angular velocity, (b) the radial acceleration, and (c) the tangential acceleration of a spaceship taking a circular turn of radius 3220 km at a speed of 29000 km/h?
Calculate each of the following if the electrons exit the field with a speed of 4.45x10^6 m/s and distance between the plates is 2.07 cm.
What is the change in kinetic energy of the puck
An observer inside the building notices that it takes 0.15s for the tile to pass her window, whose height is 2.20m. How far above the top of this window is the roof.
A 20 g ball is fired horizontally with initial speed v_0 toward a 110 g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle t..
How much work done against force of gravity
How far below the release point is the center of mass of two stones at t = 550 ms? (Neither stone has yet reached the ground.)
A child's water pistol shoots water through a 1.8 mm-diameter hole. If the pistol is fired horizontally 78 cm above the ground, the squirt hits the ground 1.8 m away. What is the volume flow rate through the squirt? Ignore air resistance.
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
What is order of the layers from top to bottom
What is the magnitude of the current in the wire as a function of time?
A brass plate measures 30 cm by 40 cm. The coefficient of linear thermal expansion is 19.0 10-6/°C. If the temperature of the plate is increased by 10.0 K, next what is the increase in the area of the plate? a) 0.350 cm2 b) 0.404 cm2 c) 0.456 cm2 ..
An airplane is flying with a velocity of 85.0 m/s at an angle of 25.0 degrees above the horizontal. When the plane is a distance 117 m straight above a dog that is standing on level ground, a suitcase drops out of luggage compartment. How far from..
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