A+3.00); c charge with a mass of 4.00 x 10-3 kg hovers above a horizontal flat insulating surface, neither descending nor ascending, and thus in mechanical equilibrium. taking g = 9.8 m/s2, what is the magnitude of the electric force on the charge? hint: keep in mind that the weight force is given by f mg ? a. 0.0281 n o b. 0.0392 n c. 0.0473 n 0 d. 0.0671 n

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false