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A bicyclist in the Tour de France crests a mountain pass as he moves at 18km/h. At the bottom, 4.0 km farther, his speed is 75km/h. What was his average acceleration (in m/s2) while riding down the mountain?
A 2.50kg bucket containing 11.5kg of water is hanging from a vertical ideal spring of force constant 120N/m and oscillating up and down with an amplitude of 3.00 cm.
A 55.0-turn circular coil of radius 4.80 cm can be oriented in any direction in a uniform magnetic field having a magnitude of 0.495 T. Find the magnitude of the maximum possible torque exerted on the coil
a charge q 4.11x10-9 c is placed at the origin and a second charge equal to -2q is placed at x1.00 m. find the
A thin double-convex lens is intended to focus the image of an object onto a screen so that the image is life-sized on the screen. find the total distance between the object and the image
A 100 kg shot-putter pushes a forward and upward force on a 4 kg shot with a force of 1000N, Calculate the vertical and horizontal components of this resultant force
A turntable rotates counterclockwise at 78 rpm. A speck of dust on the turntable is at 0.45 rad at t=0, Determine the angle of the speck at t = 8.0 second
Two 24 cm focal-length converging lenses are placed 16.50 cm apart. An object is placed 39.0 cm in front of one. Where would the final image formed by the second lens be located.
A huge space cruiser passes earth at speed c/2. It launches a small fighter ship away from earth (thank goodness) at speed c/2 relative to the cruiser. What is the speed of the fighter ship relative to earth
You look through a Polaroid sheet at a 60 W light bulb 3.00 m away. Find the intensity of the light you see
Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 5.0 s, it rotates 45 rad. What is the instantaneous angular velocity of the disk at the end of the 5.0 s
in a tape recorder the magnetic tape moves at a constant linear speed of 3.51 cms. to maintain this constant linear
A near-sighted person's eyeglasses has a focal length of ? 22.0 cm, and the lens is 1.8 cm from the eye. what should be the focal length of the corresponding contact lens
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