A student pulls on a rope attached to a box of books and moves the box down the hall. The student pulls with a force of 182N at an angle of 25° above the horizontal. The box has a mass of 35kg and &mu k between the box and the floor is 0.27. What is the acceleration of the box.
physics - Henry, Wednesday, November 10, 2010 at 10:22pm
X = hor. = 182*cos25 = 164.9 N.
C.F. = 0.27 = 27% of force used to overcome friction. 73 % used to move
F(net) = 0.73 * 164.9 = 120.4 N.
a = F(net) / m = 120.4 / 35 = 3.4 m/s^2