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1. Your boss tells you to load a VERY heavy box onto a truck. You and three of your friends try to lift it, but it doesn't budge. Remembering from physics class how pulleys can help in this situation, you rig up the following system (shown on left). Assume the pulleys are massless and frictionless.
a. If the mass of the box is 1900 kg, what are the tensions T1 through T5 and force F needed to hold the box in place?
b. What are the tensions T1 through T5 and force F needed to lift the box with an acceleration of 0.13 m/s2? see the pic 2. You are playing tetherball with your friend, when you both get so enthralled in the motion of the ball that you stop hitting it. Assume the mass of the ball is m and the length of the rope is L. (See figure above, right.)
a. How fast does the ball need to move in a circle for the rope to keep an angle ? with the vertical?
b. How long does it take for the ball to complete one revolution around this circle? please provide graph.
Car C uses tires for which the coefficient of static friction is 1.1 on a particular unbanked curve. Find the maximum speed at which car B can negotiate the curve
According to the Bohr model, a hydrogen atom in its lowest energy state has a nucleus consisting of a single proton, What is the magnitude of the "current" flowing around the nucleus
A cosmic-ray proton in interstellar space has an energy of 21.5 MeV, What is the magnetic field in that region of space
A force vector has a magnitude of 577 newtons and points at an angle 43o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force.
A block of mass m1 = 43 kg on a horizontal surface is connected to a mass m2 = 16.3 kg that hangs vertically. Determine the tension in the cord
An ac generator with a frequency of 1.34 kHz and an rms voltage of 24.2V is connected in series with a 2.00 kohm resistor and a 315 mH inductor. What is the power factor for this circuit? What is the average power consumed by this circuit?
A proton is traveling horizontally to the right at 4.00 x 106 m/s. Find the magnitude of the weakest electric field
A Ge semiconductor has a gap of 0.7 eV between the valence and conduction band. What fraction of the electrons are in the conduction band
steam at 18mpa and 600 c is contained in a cylinder of volume 0.5m3 , calculate the heat rejected by the steam
A cylindrical shell of length 220 m and radius 7 cm carries a uniform surface charge density of 13 nC/m2. Find the electric field at the ends of the following radial distances from the long axis of the cylinder
As well, the barbell rotates clockwise about its own center, with an angular speed 80 rad/s.
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