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Two point charges are separated by 6 cm. The attractive force between them is 20 N. Find the force between them when they are separated by 12 cm. (Why can you solve this problem without knowing the magnitudes of the charges?)
A 35.0-kg seal at an amusement park slides down a ramp into the pool below. The top of the ramp is 1.80 m higher than the surface of the water, and the ramp is inclined at an angle of 30.0° above the horizontal. The seal reaches the water with a s..
A heavy mass in free fall does not fall faster than a light mass. The extra weight is compensated for by extra resistance. A heavy mass on a frictionless plane does not slide down faster than a light mass. A heavy ring and a light ring both roll d..
A sailboat race course consists of four legs, defined by the displacement vectors , , , and , as the drawing indicates. find the distance of the fourth leg and the angle
A proton accelerates from rest in a uniform electric field of 690 N/C. At one later moment, its speed is 1.30 Mm/s, What is its kinetic energy at the end of this interval
A 0.15-kg bullet is fired with a velocity of 86.9 m/s into a solid cylinder of mass 24.1 kg and radius 0.23 m. Find the angular speed of the system after the bullet strikes and adheres to the surface of the cylinder
An alpha particle travels at a velocity of magnitude 420 m/s through a uniform magnetic field of magnitude 0.061 T. compute the magnitude of the acceleration of the particle
The counterbalance w1 weighs 100 N. Find out the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
A flat (unbanked) curve on a highway has a radius of 220 m. A car rounds the curve at a speed of 18.0m/s. What is the minimum coefficient of friction that will prevent sliding
An air-track glider attached to a spring oscillates between the 10 cm mark and the 60 cm mark on the track. The glider completes 10 oscillations in 48 s. What is the maximum speed of the glider
A 84.3-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.67 rad/s. Find the angular velocity of the platform with its load
an RLC series circuit consists of a 24 V (rms) 0.50 Hz AC power supply, a 25 ohm resister, a 10 H inductor, and a 0.050 F capacitor, what is the rms current through the inductor
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 7.18x10-2 kg/s. What is the speed at which gasoline moves through the fuel line
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