QUESTION: a car drived at an initial velocity of 8m/s, acceleration of 2.5 m/s^2, and travelled 4500m. how much time did it take to travel 4500m? (please tell me the steps)​

In science and physics what is the standard unit of measure for speed?

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?

What property of an object determines its inertia?