A 50 kg skier skis straight down a slope with an angle of 15.0° relative to the horizontal. The coefficient of kinetic friction between his skis and the snow is 0.100. a.) Calculate the x-and y-component of the force of gravity acting on the skier.

b.) Calculate the normal force acting on the skier.

c.) Calculate the force of friction acting on the skier.

d.) Use Newton’s 2nd Law to calculate the acceleration of the skier.

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.