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Benjamin applies a force F over a distance x to a ropeconnected to a set of pulleys. THis raises a block of weight W toheigh h above its initial level.
a) what is benjamin's work input?
b) what work is done on the book
c) What is the efficiency of the pulley system?
d) Calculate answers to the above questions given that theforce applied is 75 N over a 12-m distance, the weight of the blockis 300 N, and it is raised a vertical distance of 2 m.
A projectile is launched with an initial speed of 60 m/s at anangle of 60 degrees. It lands on a hillside 4 seconds later. What is the straight line distance to where it lands
A nonuniform, horizontal bar of mass is supported by two massless wires against gravity. Find the position of the center of mass of the bar
A solid cylinder of mass 3 kg and radius 0.2 m starts from rest at the top of a ramp, inclined 15°, and rolls to the bottom without slipping. (For a cylinder I = 0.5MR2) The upper end of the ramp is 1.2 m higher than lower end. Find the linear sp..
A toroid having a square cross section, 4.40 cm on a side, and an inner radius of 13.1 cm has 660 turns and carries a current of 0.801 A. What is the magnitude of the magnetic field inside the toroid
A piston, A, as shown below, has a diameter of 0.54cm. A second piston, B has a diameter of 3.7 cm. find the force, F, necessary to support the 500N weight in the absence of friction.
Steam enters a nozzle operating at steady state with p = 40 bar and T =400oC, and a velocity of 10 m/s. Determine the exit area of the nozzle
The first car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 10m/s, What were the original speeds of the two cars
A spaceship of mass 2.00 106 kg is to be accelerated to a speed of 0.820c. What minimum amount of energy does this acceleration require from the spaceship's fuel, assuming perfect efficiency?
a point dipole P is imbedded at the center of asphere of linear dielectric material (with radius R and dielectricer ). find the electric potential inside and outside the sphere
He wants to row directly across a river 252 wide with a constant of 1.33 m/s. Illustrate what direction should he aim his boat, and low long will it take him to cross the river
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.675 s to reach the opposite tower, 20.0 m away. If a 1 meter length of ..
For a damped oscillator with a mass of 320g, a spring constant 82N/m and a damping coefficient of 71g/s, what is the ratio of the amplitude of damped oscillations to the initial amplitude at the end of 28 cycles.
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