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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 speed of the horse is 9.28 m/s and the distance from the limb to the saddle is 3.67m.
(a) What must be the horizontal distance (m) between the saddle and the limb when the ranch hand makes his move?
(b) How long (s) is he in the air?
A 34 kg child on a swing 6,9 meters long is released from rest when the swing supports make an angle of 38,9 degrees with the vertical. Neglecting friction, find out the child's speed (m/s) at the lowest position to two decimal places. Use 9,8 m/s..
A woman stands on a scale in a moving elevator. Her mass is 60.9 kg, and the combined mass of the elevator and scale is an additional 819 kg. Starting from rest, the elevator accelerates upward. Through the acceleration, the hoisting cable applies a ..
two parallel plates are separated by a distance of 25mm. the potential difference across the plates is 500v, what is the change in kinetic energy of the electron in electron volts
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 3.60 × 1013 kg.m/s. Find the relativistic momentum of the spacecraft
A 6.5×10-25-kg particle is vibrating with simple harmonic motion with a period of 5.0×10-6 s and a maximum speed of 6.00×102 m/s. Find the Maximum displacement of the particle.
A planar electromagnetic wave is propagating in the +x direction. What is the Poynting vector at the point P at that instant
An ideal spring with a stiffness of 379N/m is attached to a wall, and its other end is attached to a block that has a mass of 16-kg. The spring/block system is then stretched away from the spring's relaxed position until 59J of mechanical potentia..
35MW of power at 45kV (rms) arrives at a town from a generator via 5.0? transmission lines. Calculate the emf at the generator end of the lines
A pitcher throws a curveball that reaches the catcher in 0.55 s. What is the angular displacement of the baseball as it travels from the pitcher to the catcher
An 85-kg man stands 0.70 m from the center of a large, rotating turntable with a frictionless axis. What is the turntable's moment of inertia
A current of 10^-14 A is produced in a free-air chamber operating under saturation conditions. The sensitive volume, in which electronic equilibrium exists, contains 0.22g of air. What is the exposure rate .
A box of textbooks of mass 24.7 kg rests on a loading ramp that makes angle a with the horizontal. The coefficient of kinetic friction is .25 and the coefficient of static friction is .37. Find out the minimum angle at which the box starts to sl..
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