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A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 12.0 m/s, and the distance from the limb to the level of the saddle is 4.00 m. (a) What must be the horizontal distance between the saddle and limb when the ranch hand makes his move? (b) How long is he in the air?
Find a relation between the variables that would guarantee that the block is initially slowing down.
Two charged dust particles exert a force of 4.20 x 10^-2 N on each other. What would be the force if they are moved so they are only one-eight as far apart.
What is the frequency of the small axial oscillations that electron will undergo if it is released along the z-axis near the origin.
A carbon sample of the same size taken from a fresh piece of bone emits 16 beta emissions a minute. How long ago did the saber-tooth tiger live?
Co-60 is often used as a radiation source in medicine. It has a half-life of 5.25 years. How long, after a new sample is delivered, would the activity have decreased to about 1/3 its original value.
Light of wavelength 450 nm falls on the 0.48 mm wide slit and forms a diffraction pattern on a screen 1.1 m away.
Two small metal spheres with masses 2.0 {rm g} and 4.0 {rm g} are tied together by a 5.3-{rm cm}-long massless string and are at rest on a frictionless surface. Each is charged to +2.3 mu C. What is the energy.
Charge is scattered uniformly throughout a long cylindrical shell of inner radius R and out radius 2R. At what radius is the electric field equal to one-half the value on the outer surface.
Four charges are placed at the vertices of a square, centered at the origin. If each side of the square has a length of 0.224 m, what is the strength and direction of net electric field at the origin? Express your answer in terms of the charge ma..
assume the roller coaster (h1 = 37 m, h2 = 13 m, h3 = 30) passes point A with a speed of 3.10 m/s. If the average force of friction is equal to one third of its weight, with what speed will it reach point B? The distance traveled is 55.0 m.
What minimum coefficient of static friction is required? Is the reply you found reasonable? In other words, is he probable to stay on the merry-go-round.
A box of mass 32 kg is at rest on a horizontal frictionless surface. A constant horizontal force then acts on the box, and accelerates it to the right. It is observed that it takes the box 6.5 seconds to travel 48 meters. What is the magnitude of for..
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