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If a boat can move in still water at 28 mph, but it is moving west to cross a stream that flows 7.2 mph south. What velocity does the boat ultimately achieve? solve with free body diagram,in other words, sketch and equate.
Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is thirty-six times that of satellite B
Three charges, +q, +2q, and +4q, are linked by strings (Assume that the middle charge is fixed in space and the other 2 charges are held there by the tension alone.)
An artificial satellite circles the Earth in a circular orbit at a location, Determine the orbital period of the satellite
The pilot of an airplane travelling 200 km/h wants to drop supplies to flood victims isolated on a patch of land 165m below. The supplies should be dropped how various seconds before plane is directly overhead.
The transformer in the power supply for a computer's 500-GB external hard drive changes a 120-V input voltage, what is the current in the primary and secondary when the drive is in operation
A 3.11kg stone is tied to a thin, light wire wrapped around the outer edge of the uniform8.23kg cylindrical pulley, What is the rotational inertia of the pulley
With brakes fully applied, a 1430kg car decelerates from a speed of 74km/hr. What is the work done by the braking force in bringing car to a stop.
A 50-kilogram woman balances on one heel of a pair of high heel shoes. If the heel is circular with radius of .5 cm, what pressure does she exert on the floor.
The wire is cut at point P. Will the potential difference between points A and B increase, decrease, or remain the same? Give reason for.
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
If the orientation of the spacecraft is to be changed by 30.0°, for what time interval must the gyroscope be operated.
A projectile is fired from the surface of the Earth with a speed 200 meters per second at an angle of 30 degrees above the horizontal. what is the maximum height reached by the projectile
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