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A boy on the edge of a vertical cliff 20 m high throws a stonehorizontally outward with a speed of 20 m/s. It strikes the grounfat what horizontal distance from the foot of the Cliff? Use g=10m/s2.
A hunter aims directly at a target (on the same level) 140 m away.
A uniform disk of radius 0.471 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
A model-train transformer plugs into 120-V ac and draws 0.41A while supplying 7.8A to the train. Is the transformer step-up or step-down
A 60 kg person jumps from rest off a 5m high tower straight down into the water. find the average force that the water exerts on the diver
A force vector has a magnitude of 584 newtons and points at an angle 45o of below the positive x axis. What are (a) x scalar component and (b) y scalar component of the vector.
A 0.300 kg hammer is moving horizontally at 8.00 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. What was the average force exerted on the nail
A 200-kg crate is pushed horizontally with a force of 715 N. If the coefficient of friction is 0.20, compute the acceleration of the crate.
An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. how much kinetic energy did each piece acquire
an artificial lens is implanted in a persons eye to replace a diseased lens. the distance between the artificial lens
four point charges have the same magnitude of 2.59 x 10-12 c and are fixed to the corners of a square that is 4.40 cm
When laser light of wavelength 633.3nm passes through a diffraction grating. thef irst bright spots occur at +- 18.4 degree from the central maximum, At what angle do the second bright spots occur
A 1945-W electric hair dryer is designed to work in the United States, where the ac voltage is 120 V rms. What power is dissipated in the hair dryer
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