In the absence of air resistance, a boulder and a pebble dropped from rest will fall with equal
A)forces of gravity.
B)accelerations.
C)energies.
D)all these.
The reason that this quantity is not greater for the boulder than the pebble is that
E)both the boulder and the pebble fall at the same speed.
F)the initial potential energies of each is the same.
G)gravitational force acting on each is the same.
H)the greater gravitational force on the boulder acts on a correspondingly greater mass.

Question

Quizplus · Accepted Answer

B) In the absence of air resistance, all objects fall with the same acceleration due to gravity, regardless of their mass. This is a fundamental principle of physics, specifically Newton's second law of motion and the theory of general relativity.H) The reason the acceleration is not greater for the boulder than for the pebble, despite the boulder having a greater gravitational force acting on it, is because the boulder also has a greater mass. According to Newton's second law (F=ma), the greater force required to move the boulder is exactly balanced by its greater mass, resulting in the same acceleration for both the boulder and the pebble.

In the Absence of Air Resistance, a Boulder and a Pebble