Aloaded ore car has a mass of 950 kg and rolls on rails with negligible friction. it starts from rest and is pulled up a mine shaft by a cable connected to a winch. the shaft is inclined at 24.0° above the horizontal. the car accelerates uniformly to a speed of 2.00 m/s in 12.5 s and then continues at constant speed. (a) what power must the winch motor provide when the car is moving at constant speed? kw b) what maximum power must the motor provide? kw (c) what total energy transfers out of the motor by work by the time the car moves off the end of the track, which is of length 1,250 m?

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

there are no contact forces mentioned on the list of choices that you've provided.