How many revolutions baseball makes on way to home plate
A good baseball pitcher can throw a baseball toward home plate at 98 mi/h with a spin of 1590 rev/min. How many revolutions does the baseball make on its way to home plate? For simplicity, assume that the 60 ft path is a straight line.
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A loudspeaker of mass 22.0 kg is suspended a distance of h = 2.20 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.10 m. What is the tension in each of the cables?
What frequency is heard by a stationary observer when the engine moves toward him at 25.0m/s is the temperature outside is 40 degrees Celsius, speed of sound 355m/s?
At the same time, a stationary trumpeter played the same note. Ballot heard 4 beats/s. How fast was the train moving toward him? The speed of sound in air is 343 m/s .
The fundamental frequency of the standing waves in the portion of the string above the rod is f. Find the mass of the portion of the string above the rod.
How many revolutions does the baseball make on its way to home plate? For simplicity, assume that the 60 ft path is a straight line.
Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 1.1 s after passing his window. Roger's room is on the fifth floor, 25 m above the sidewalk. Assuming the balloons are being released from rest, fro
Find the time taken for the casting to slide down the plane a distance of 10 m without any external force being applied. Find also, the force required to give the casting an acceleration of 2 m/s2 up the plane.
What distance does the car cover in the last 2.0 seconds of its motion? What is the constant speed that characterizes the middle portion of its motion?
A 340-kg sailboat has an acceleration of 0.76 m/s2 at an angle of 63° north of east. Find the magnitude and direction of the net force that acts on the sailboat.
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