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a 0.90 kg book rests on a table. A downward force of 3.5 N is exerted on the top of the book by a hand pushing down on the book.
a. What is the gravitational force acting on the book?
b. what is the size of the normal force exerted by the table on the book?
To explain why he seems to hang in the air, compute the ratio of the time he is above ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore air resistance.
A jeweler working with a heated 47 g gold ring should lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celcius, what mass of water at 25 degrees Celcuis is needed to lower the ring's temperature to 38 ..
If the electric field strength in air exceeds 3.0 ? 106 N/C, the air becomes a conductor, determine the maximum amount of charge that can be carried by a metal sphere4.9 m in radius
A diving board of length 3.00m is supported at a point 1m from the end, and a diver weighing 520 m stands at the free end . The diving board is of uniform cross section and weighs 270m.
The Hall voltage across a conductor in a 42mT magnetic field is 1.9mu V. When used with the equal current in a different magnetic field, the voltage across the conductor is 2.7mu V.
A laser emits a narrow, circular beam of light. The radius of the beam is 1.37×10-3 m, and the power is 1.44×10-3 W
A pair of long rods, each of length L and mass M are connected to a hoop of mass M and radius L/2 to form a 4-spoked wheel. Determine the instantaneous velocity of the mass after the wheel has turned one revolution
A cement block accidentally falls from rest from the ledge of a 74.8-m-high building. When the block is 18.4 m above the ground, a man, 2.10 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have ..
How much time does it take to lift container with the motor.
A cardinal (Richmondena cardinalis) of mass 4.00×10-2 and a baseball of mass 0.143 have the equal kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
A block of mass m =2.00kg is released from rest at h=0.300 m from the surface of a table at the top of a theta=50.0 degree incline as shown below. How far from the table will the block hit the floor
A magnetic B field with strength 1 T passes through a metal square loop measuring 0.8 m on its side. If the B field is parallel to the loop's normal
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