40. An electric motor raises a load of 0.2 kg, at a constant speed, through a vertical distance of 3.0 m in 2: the acceleration of free fall is 10 m/s2, the power in W developed by the motor in raising the load is :

(a) 0.3
(b) 1.2
(c) 3.0
(d) 6.0
41. An object is falling freely from a height x. After it has fallen a height, it will possess :
(h) only kinetic energy

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)