A 5.0-kg object slides down a frictionless surface inclined at an angle of 30o from the horizontal. The total distance moved by the object along the plane is 10 meters. The work done on the object by the normal force of the surface is:

An electron and a proton are held on an x axis, with the electron at x = + 1.000 m and the proton at x = - 1.000 m. part a how much work is required to bring an additional electron from infinity to the origin? express your answer with the appropriate units. part b if, instead of the second electron coming in from infinity, it is initially at x = + 20.00 m on the axis and is given an initial velocity of 100.0 m/s toward the origin, does it reach the origin? part c how close to the origin does it come?