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A billiard ball moving at 1.5 m/s in the x direction collides with an identical ball initially at rest. after the collison one ball moves off at 45 degrees above the x axis. find both balls post collision velocities
A stuntman drives a car over the top of a hill, the cross section of which can be approximated by a circle of radius R = 250 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill?
A ball is thrown off the top of a building with a velocity v at an angle ? with respect to the horizontal. Find the total time of flight until the ball hits the ground
A Geiger counter reading of a radioactive sample is initially 6920 counts per minute. What is the sample's half-life
A mass m = 3 kg is hanging from an ideal string which is passed over a fixed, frictionless pulley and then is attached to the upper end of a vertical spring whose lower end is fixed to the floor. What is the maximum stretch of the spring
A 1300kg sports car accelerates from 0m/s to 33m/s in 12s . What is the average power of the engine?
A person with a weight of 273.6 lb stands on two feet with their weight equally distributed between the two shoes, What is the pressure on each shoe independently
find out the speed with which the pebble strikes the ground when the pebble is fired (a) horizontally, (b) vertically straight up, and (c) vertically straight down
A metal ball with a mass of 2.97·10-6 kg and a charge of +4.91 mC has a kinetic energy of 6.81·108 J. how close will it come to the plane before stopping
A particle of mass 3.67 MeV/c2 and kinetic energy 11.01 MeV collides with a stationary particle of mass 11.01 MeV/c2. Find the mass of the system after the collision
A 220 g top spinning at 14 rev/s makes an angle of 30° to the vertical and precesses at a rate of 1 rev per 8.0 s. what is the moment of inertia of the top
A 30 cm-diameter vertical cylinder is sealed at the top by a frictionless 15 kg piston. What will the height of the piston be
A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, What is the initial current through the patient
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