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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.
Two point charges are on the y-axis. A 4.0 µC charge is located at y =1.05 cm, and a -2.06 µC charge is located at y =-1.70 cm. Find the total electric potential at the origin.
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a high speed cooling fan has a maximum angular speed of 15.0 rad/sec, calculate the angular acceleration when the device goes from idle speed to operational speed
The output piston of a hydraulic press has a cross-sectional area of 0.20 cm2. What force is applied to the input piston if that piston has a diameter of 5.0 cm
How to find out the tension in the cable
A thick, vertical iron pipe has an inner diameter of 0.077 m. A thin aluminum (? = 23x10-6 (C°)-1) disk, What is the temperature of the aluminum disk when the disk falls into the pipe
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A student at the top of a building throws a ball straight upward with an initial speed v0. How do the final velocities of the balls compare when they reach the ground
A boat has a mass of 5220 kg. Its engines generate a drive force of 4480 N due west, What is the boat's acceleration
Starting from rest, a 2.2x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, What is the flea's speed when it leaves the ground
Interstellar reddening of a stars blackbody spectrum can complicate the estimation of a star's temperature by distorting the blue (short wavelength) end of a star's spectrum. Describe the cause and how this reddening occurs.
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