A worker pushes a 50 kg crate a distance of 7.5 m across a level floor. He
pushes it at a constant speed by applying a constant horizontal force. The
coefficient of kinetic friction between the crate and the floor is 0.15.
a. Find the magnitude of the applied force.
b. How much work did the worker do on the crate?
c. How much work did the friction force do on the crate?
d. How much work did the normal force do on the crate?
e. How much work did the gravitational force do on the crate?
f. What was the total work done on the crate?
g. What was the change in the kinetic energy of the crate?
Answers: 3
Physics, 22.06.2019 00:20, glogaming16
In the derivation of rrkm theory, a factor of 1/2 is introduced when equalizing the rates of formation and decomposition of activated complex as keal-hr) = ko this is clearly against the assumption of transition state theory that states all the activated complex in the transition state iss going to the product. find the reason why this factor is introduced here.
Answers: 2
Physics, 22.06.2019 01:30, markmeinberg
Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz
Answers: 3
Physics, 22.06.2019 18:30, kalithekittenqueen
Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton
Answers: 2
A worker pushes a 50 kg crate a distance of 7.5 m across a level floor. He
pushes it at a cons...
pushes it at a cons...
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