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A good baseball pitcher can throw a baseball toward home plate at 85 miles per hour with a spin of 1800 revolutions per minute. How many rotations does it make on a path of 60 feet?
how far is this point horizontally from the end of the ramp. A skateboarder shoots off a ramp with a velocity of 6.2 m/s, directed at an angle of 61° above horizontal. The end of the ramp is 1.5 m above the ground.
Suppose an object is set sliding, with a speed less than escape velocity, on an infinite frictionless plane in contact with the surface of the Earth. Describe its motion.
What is the magnitude of the force on an electron that is in the region between the plates at a point accurately 2.52 mm from the positive plate
The three ropes are tied to a small, very light ring. Two of these ropes are anchored to walls at right angles with tensions T1 = 35 N andT2 = 70 N. What are the magnitude and direction of the tension Tvec3 in third rope.
The motion of peg P is constrained through the lemniscate curved slot in OB and by the slotted arm OA.
A projectile is fired with an initial speed v at an angle of 30 degrees above the horizontal from a height of 40meters above the ground. The projectile strikes the ground with a speed of 1.2v. Find v.
A person is standing at the edge of the water and looking out at the ocean (see figure). The height of the person's eyes above the water is h = 1.8 m, and the radius of the Earth is R = 6.38 x 106 m. (a) How far is it to the horizon? In other word..
Treating the pulley as a uniform disk, determine the speeds of the two objects as they pass each other.
The hemisphere is placed on its flat surface, with the center directly over a 2.5 mm long line drawn on a sheet of paper. What length of line is seen by someone looking perpendicularly down on the hemisphere?
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided.
Light is incident on a slit 0.750 mm wide. On a screen 2.00 m away, the distance from the central maximum to the first minimum is 1.35 mm. compute the wavelength of the light.
A worker pushed a 27kg block 7.4m along a level floor at constant speed with a force directed 29° below the horizontal.
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