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A stone is dropped from 448 m. What is the time it takes for the stone to reach the ground (without air resistance)?
A soccer ball is kicked with an initial speed of 28 m/s at an angle of 22° with respect to the horizontal. Find the maximum height reached by the ball
An 8.5- {rm kg} point mass and a 15- {rm kg} point mass are held in place 50- {rm cm} apart. A particle of mass m is released from a point between the two masses 19- {rm cm} from the 8.5-{rm kg} mass along the line connecting two fixed masses.
A circular loop of wire 55 mm in radius carries a current of 50 A. At the center of the loop, what are the following? The energy density, The magnetic field strength
A 2.40-kg textbook is forced against a horizontal spring of negligible mass and force constant 300 N/m , compressing the spring a distance of 0.260m. find how far the textbook moves from its initial position before coming to rest
A train is travelling up a 3.2 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast. How long does it take for the last car to come to rest.
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 27.0° above the horizontal. What is the magnitude of the net torque exerted on the branch by the children
A circularwire loop of radius 20.0 cm carries acurrent of 2.90 A. It is placed sothat the normal to its plane makes an angle of 50.0° with a uniform magnetic field of14.0 T. Calculate the magnetic dipole moment of the loop
When the hamster is running in a wheel, the temperature of the air in the calorimeter rises 1.60 per hour. how many grams of seed must the hamster eat per hour to supply this energy
two blocks are connected by a massless string which passes through a hole in a frictionless table. the blocks have
A sledge loaded with bricks has a total mass of 19.0kg and is pulled at constant speed by a rope inclined at 20.4 degrees above the horizontal. What is the tension in the rope
As a 1220 kilogram truck travels up a 15.4 meter high hill, the non conservative forces of friction, obtain the change in the truck kinetic energy as it travels from the bottom of the hill to the top of the hill
In a 231-turn automobile alternator, the magnetic flux in each turn is fB = (2.36E-4 T*m2) cos(?t), where ? is the angular speed of the alternator. determine the maximum emf in the alternator
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