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Question
At a construction site, a 65.0 bucket of concrete hangs from a light (but strong) cable that passes over a light friction-free pulley and is linked to an 85.0box on a horizontal roof. The cable pulls horizontally on the box, and a 46.0 bag of gravel rests on top of the box. The coefficients of friction between box and roof are shown. The system is not moving.
Us=0.7Uk=0.4
A. Find out the friction force on the bag of gravel.Express the answer using two significant figures.
B. Find out the friction force on the box.
C. Suddenly a worker picks up the bag of gravel. Use energy conservation to discover the speed of bucket after it has descended 1.80, from rest.
Two protons are moving directly toward one another, When they are very far apart, their initial speeds are 2.77 106 m/s. What is the distance of closest approach
a block with mass M rests on a frienctionless surface and is connected to a horizontal spring force k. Find the maximum amplitude of oscillation such that the top block will not slip on the bottom block
at what distances from the speaker do you hear a minimum sound intensity.
A luge and its rider, with a total mass of 104 kg, emerges from a downhill track onto a horizontal straight track with the initial speed of 53 m/s. suppose they stop with the constant deceleration of 2.30 m/s2.
A car is traveling along a straight road at a velocity of +34.0 m/s when its engine cuts out. Find the velocity of the car at the end of the initial ten-second interval
110 grams of boiling water (temperature 100° C, heat capacity 4.20 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 24° C (the heat capacity of aluminum is 0.9 J/gram/K).
One particle has a mass of 4.42 x 10-3 kg and a charge of +7.35 %u03BCC. A second particle has a mass of 8.69 x 10-3 kg and the same charge. Find the initial separation between the particles
A 35 kg block of ice slides down a frictionless incline 1.6 m along the diagonal and 0.63 m high, Find the magnitude of the worker's force. How much work is done on the block by the worker's force
How large does the radius R of the dish have to be to achieve an electric field vector amplitude of 0.1 rm mV/m at the receiver.
The central star of a planetary nebula emits ultraviolet light with wavelength 104nm, What is the first-order diffraction angle
find the angle counterclockwise relative to the horizontal.
A proton is at the origin and an electron is at the point x = 0.45nm , y = 0.35nm. Find the electric force on the proton
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