Un objet suit un mouvement rectiligne en étant poussé par une force de 10 newtons et en subissant une force de frottement cinétique de 8 newtons. L'objet possède une accélération de 2 m/s2 au cours de ce mouvement. Quelle est sa masse en kg?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

The solid that is formed and usually sinks to the bottom of a solution is the

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point