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A catapult launches a rock at a 50° angle with respect to the horizontal. Find the maximum height attained if the speed of the rock at its highest point is 30.3 m/s.
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At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The boys are seated in positions 45° from each other. How far apart will the three teddy bears land
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1020 Hz. The bird-watcher, however, hears a frequency of 1060 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 10 m in an evacuated chamber. Find the difference in final speeds of the two spheres
A cat stands on a board of wood in a frozen frictionless pond. The mass of the cat is 4.0 kg, and the mass of the board is 3.0 kg. how far does the cat move in relation to the pond
Through 5 successive 1.04 min intervals, a runner moves at the following constant speeds: 0.405 km/min, 0.220 km/min, 0.160 km/min, 0.163 km/min, and 0.323 km/min. compute the total distance travelled and average speed.
A ski starts from rest and slides down a 28 degree incline 70m long. If the coefficient of friction is 0.090, what is the ski's speed at the base of the incline
A high diver of mass 65kg jumps off a board 10m above the water. If her downward motion is stopped 1.70 s after she enters the water, what average force did the water exert on her.
A lightbulb has a resistance of 13? and consumes 9.4W of power; the rod is 1.33m long and moves to the left with a constant speed. what is the speed of the rod
A diving bell with interior air pressure equal to atmospheric pressure is submerged in Lake Michigan at a depth of 180.5 m. find the magnitude of the net force on the viewing port
q1. a proton is travelling to the right at. it has a head-on perfectly elastic collision with a carbon atom. the mass
A long straight wire suspended in the air carries a conventional current of 8.2 amperes in the ?x direction, What is the (vector) magnetic field due to the wire at the location of the electron
A baseball leaves a pitcher's hand horizontally at a speed of 156km/h. The distance to the batter is 18.3 m. (overlook the effect of air resistance.) (a) How long does ball take to travel the first half of that distance? (b) The second half? (c) H..
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