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A 900 kg sports car collides into the rear end of a 2100 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.9 m before stopping. The police officer, knowing that the coefficient of kinetic friction among tires and road is 0.75, calculates the speed of the sports car at impact. What was that speed?
a 49.0-g super ball traveling at 30.0 ms bounces off a brick wall and rebounds at 15.0 ms. a high-speed camera records
A Ping-Pong ball with mass 6 g is attached by a thread to the bottom of a beaker. When the beaker is filled with water so that the ball is totally submerged, Determine the diameter of the ball
a ring has a radius r and charge q. the ring is shrunk to a new radius 12 r with no change in its charge. by what
Two people are pushing their stalled car up a hill with anincline of 4.20 degrees. They are pushing parallel to the surfaceof the hill. The cars mass is 954 kg. What is the combined forcethey must apply to keep the car moving at a constant speed up t..
a polymer molcule is 3.05μ m long. the ends of themoleculebecome singly ionized-negative on end end, determine the effective spring constant of the molecule
A railroad freight car of mass3.24multiplied by104kg collides with a stationary caboose car. Find the mass of the caboose
A 5 kg rock is dropped from rest down a vertical mine shaft. How long does it take for the rock to reach a depth of 79 m? Neglect air resistance.
A compound microscope has a tube that is 19.50 cm long. The focus of the eyepiece is 1.5 cm and the focus of the objective is 0.6 cm . If the distance for normal vision is 25 cm ,what is the approximate magnification of the microscope?
A 1.10 kg mass is at the center of a uniform spherical shell of mass 1.07 1020 kg and radius 1.05 106 m. Find the resultant gravitational force on the mass
The radius of curvature of a mirror is 12cm. A diamond ring isreplaced in front of the mirror. Find the object distance of the ring
A distant galaxy emits light that has a wavelength of 499.8 nm. On earth, the wavelength of this light is measured to be 503.8 nm. Find the speed of the galaxy relative to the earth
Your 12 kilogram baby sister is hanging on the bottom of a table cloth with all her weight. Find the acceleration of the turkey
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