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A 920 kilogram sports car collides into the rear end of a 2300 kilogram SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 3.0 meter before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road is 0.80. Estimate the speed of the sports car at impact. Determine what was that speed?
a solid ball and a hollow ball each with a mass of 2.29 kg and radius 0.115 m start from rest and roll down a ramp of
two balls are launched upward from the same spot at different angles with respect to the ground. both balls rise to the
A magnetic field of 0.436 T and a perpendicular electric field of 5.54 kV/m act on a moving electron to produce no net force. Discover the speed of the electron. Give the answer in kilo-meter/second (km/s) and to two decimal places.
Water is flowing through a pipe with a constriction. The diameter of the narrow section is one-third the diameter of the wide section. what is the velocity of the fluid in the wide section
An Earth satellite's elliptical orbit ranges from 300km to 840km altitude. At the high point, it's moving at 7.29km/s. How fast is it moving at the low point
A generator connected to an RLC circuit has an rms voltage of 120V and an rms current of 34mA. what is the inductive reactance of the circuit
It takes a student t = 5.2 s to push a block m = 6 kg at a constant velocity over a distance of d = 4.6 m. How much power was applied to the block in Watts
Two positive point charges each have a charge of +q and are fixed on the y axis at y = +a and y = -a. (Use the following as necessary: k, q, a, and x.), Find the electric potential at any point on the x axis
A bowling ball weighing 71.6 is attached to the ceiling by a rope of length 3.71 . The ball is pulled to one side and released, What is the acceleration of the bowling ball
Does the period of a pendulum depend on the mass of the bob? The length of the string? Upon what else does the period depend?
An organ pipe open at both ends has a harmonic with afrequency of 416 Hz. Find the fundamental frequency and the length of the pipe
To make a bounce pass, a player throws a 0.60-kgbasketball toward the floor. find the magnitude of the impulse delivered to it by the floor
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