Question

purpose: this quiz will test your comprehension of the content from module 5. instructions: this quiz consists of 10 multiple - choice questions. this quiz doesnt have a time limit and you can retake it as many times as you would like. click on \take the quiz\ once you are ready to begin. question 2 1 pts a feather and a coin dropped in a vacuum fall with equal forces due to gravity. accelerations. kinetic energies. none of these.

Explanation:

In a vacuum, there is no air - resistance. According to Newton's second law \(F = ma\) and the gravitational force formula \(F=mg\), the acceleration \(a = g\) (acceleration due to gravity) for all objects near the Earth's surface, regardless of their mass. So a feather and a coin dropped in a vacuum have equal accelerations. The force due to gravity \(F = mg\) depends on mass (\(m\)), so they have different gravitational forces if their masses are different. Kinetic energy \(K=\frac{1}{2}mv^{2}\) also depends on mass and velocity, and since their masses are different, their kinetic energies will be different at the same speed.

Answer:

B. accelerations