Physics, 05.08.2019 21:20 alexanderavrett
Astudent decides to move a box of books into her dormitory room by pulling on a rope attached to the box. she pulls with a force of 80.0 n at an angle of 25.0° above the horizontal. the box has a mass of 25.0 kg, and the coefficient of kinetic friction between box and floor is 0.300. (a) find the acceleration of the box. (b) the student now starts moving the box up a 10.0° incline, keeping her 80.0 n force directed at 25.0° above the line of the incline. if the coefficient of friction is unchanged, what is the new acceleration of the box?
Answers: 2
Physics, 21.06.2019 16:30
A12-kg bag of groceries is tossed onto a table at 4.0 m/s and slides to a stop in 2.2 s . modify the equation fδt=δ (mv) to find the force of friction.
Answers: 2
Physics, 22.06.2019 17:30
Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=
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Physics, 22.06.2019 19:20
Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.
Answers: 1
Astudent decides to move a box of books into her dormitory room by pulling on a rope attached to the...
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