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A horizontal force of 50 N pushes a box that weighs 75 N across the floor at a constant speed. The coefficient of kinetic friction between the box and the floor is 0.67.
a) Draw the free-body diagram for the box. Clearly label all of the forces that are present.
b) What is the magnitude of the frictional force acting on the box?
c) What is the power generated by the applied force if it takes 30 seconds to push the box 12 meters?
A blue ball is thrown upward with an initial speed of 22.8 m/s, from a height of 0.9 meters above the ground. 2.8 seconds after the blue ball is thrown, How long after the blue ball is thrown are the two balls in the air at the same height
A nonconducting ring of radius of 11.6 cm is uniformly charged with a total positive charge of 10.0 µC. find the magnitude of the magnetic field on the axis of the ring 5.00 cm from its center
An R = 67.8 ? resistor is connected to a C = 47.8 ?F capacitor and to a ?VRMS = 117 V, and f = 112 Hz voltage source. Calculate the power factor when the capacitor is replaced with an L = 0.335 H inductor
In an experiment, 210 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 48.0 g of water (4186 J/kg·K) at 20°C, What is the entropy change of the aluminum
A child with a mass of 55 kg is riding on a merry-go-round. If the child has a speed of 3 m/s, what is the child's angular momentum
Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape, How high up is Bob
Determine Maximum wavelength and Minimum wavelength. How various penguins of mass 16 kg each can stand on the ice block before they find their feet wet.
A circuit consists of a resistor in series with an inductor and an ac generator that supplies an rms voltage of 115 V. Find the average power dissipated in the circuit
Answers for an elevator are moving down with an acceleration of 3.360 m/s. what would be the apparent weight of a 64.20 kg man in the elevator.
Migrating geese tend to travel in straight-line paths at approximately constant speed. How far is the goose from its original position
What is the strength of the electric field.
A photon is emitted when a hydrogen atom undergoes a transition from the n = 10 state to the n = 4 state. Calculate values for the following. (a) the wavelength nm (b) the frequency Hz (c) the energy of the emitted photon eV
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