An airplane needs to reach a forward velocity of 184.0 km/h to take off. on a 2000-m runway, what is the minimum uniform acceleration necessary for the plane to take flight if it starts from rest?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

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?