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A soccer ball is lofted toward the goal from a distance of 9.00 m. It has an initial velocity of 12.7 m/s and is kicked at an angle of 72.0 degrees above the horizontal. (a) When the ball crosses the goal line, how high will it be above the ground? (b) How long does it take the ball to reach the goal line? (It will still be in the air.
Calculate the velocity of a satellite moving in a stable circular orbit about the Earth at a height of 3700 km
A man throws a grenade from a car that is travelling at 90km/hr and wishes to throw it into a car heading in the same direction at 110km/hr
A 0.400-kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 23.0 N/m. How far does the putty-block system compress the spring
A pendulum has a length L = 1.11m. It hangs straight down in a jet plane about to take off as shown by the dotted line, Calculate the magnitude of the plane's acceleration
A platinum resistance thermometer has resistances of 200.0 ? when placed in a 0?C ice bath and 253.8 ?, What is the melting point of potassium
A large tree trunk is floating in the sea. The density of the sea water is 1040 kg/m3, What fraction of the trunk's volume is above the surface of the water
One of Saturn's moons has an orbital distance of 1.87 x 108 m. estimate a mass for the planet Saturn
A 135-kg platform oriented horizontally consists of a uniform disk of radius 1.59 m and can rotate about the vertical axis through its center. Find the moment of inertia of this system
Place a friction block fuzzy side down on a track and add some mass on top to give it extra traction. Pull the block VERY SLOWLY with a spring scale, starting with very little effort but continuously increasing your effort over a few seconds until..
Two spheres, fastened to "pucks" riding on a frictionless air track, are charged with +2 × 10-8 C, and +6 × 10-8 C, correspondingly. Both objects have the same mass. As they repel.
A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.54 m. Where should the third charge be located
the hanging object has a mass of m1 = 0.370 kg; the sliding block has a mass of m2 = 0.780 kg; and the pulley is a hollow cylinder with a mass of M = 0.350 kg, Find the angular speed of the pulley at the same moment
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