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Q. A 22.0-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 78.5 N and is directed at an angle of 30.0° above the horizontal. Determine the coefficient of kinetic friction.
Q. A spherical shell of mass 2.7 kg and radius 5.0 cm is given a charge of -7.0 mC and is held fixed in space. A second small spherical ball is brought to a spot 3 cm from the surface of the shell, released and moves away. The ball is small enough to be treated as a point charge, has a mass of 95 g and a charge of 4.0 microCouloumbs.
a. Determine the value of the electric potential at the initial and final position.
b. determine the position of the ball when it has a speed of 200 m/s using a reference point.
c. calculate the acceleration of the ball when it is 3 cm from the surface and again at the position determined in part b
A thin 12 cm long solenoid has a total of 490 turns of wire and carries a current of 1.9 A. find the magnitude of the field inside near the center.
An oscillating LC circuit has a current amplitude of 7.50 mA, a potential amplitude of 250 mV, and the capacitance of 220 nF. What are (a) the period of oscillation.
A 70 kg man (rad=0.25m) standing on a 10-kg disc (rad=0.4m) with his arms extended (rad=0.9m) holding a 15-kg weight in each hand. What is the rotational inertia of man with weights.
What mass (in grams) of steam at 100 °C must be mixed with 287g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, an..
Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which is true about their kinetic energies as they reach the gr..
Suppose that you hear a clap of thunder 18.4 s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00 x10^8 m/s. How long are you from the lightning stroke.
A 64-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 834 N. What is the acceleration of elevator.
The hydraulic cylinder is subjected to 3 forces. An 8kN force is exerted on cylinder at B that is parallel to the cylinder and points from B towards C. The link AC exerts the force at C that is parallel to the line from A to C. The link CD exerts ..
We have pumped 20 bbls of fluid from the cement unit. But we think that we should have already achieved 425 psi at the unit. We are rigged up to do F.I.T and have already pressure tested all surface lines and there are no leaks.
Please helps me out for determining the following if the capacitor in the circuit below is initially uncharged.
Two trains and a bird Two trains, each having a speed of 23km/h, are headed at each other on the equal straight track. A bird that can fly 60km/h flies off the front of one train when they are 70 km apart and heads directly for the other train.
Two speakers, one straight behind the other, are each generating a 285 Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Suppose that the s..
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