When two ball of different masses are dropped from a 2 story building (ignore air resistance), they will hit at the same time because they have
the same gravitational force.

How would doubling the made of an object change the objects potential energy

What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?

Discuss the difference between thermal energy and heat. (terrance) terrance, egolf, r., congdon, donald. physical science student text, 5th edition. bju press, 2014. vitalbook file.