No, not all objects fall. Only objects that are subject to gravity, like those on Earth's surface, will fall when not supported. Objects in space, for example, are in a state of free fall around a celestial body due to gravitational forces.
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Yes, in free fall all objects experience the same acceleration due to gravity, regardless of their mass. This acceleration is approximately 9.8 m/s^2 on Earth.
Yes, in the absence of air resistance, all objects will fall to the Earth at the same rate regardless of their mass. This is known as the acceleration due to gravity, which is approximately 9.81 m/s^2 near the Earth's surface.
The speed of an object in free fall increases by 9.8 m/s every second. Therefore, after 2 seconds of free fall, the speed of the ball will be 9.8 m/s * 2 seconds = 19.6 m/s.
In a vacuum, all objects fall at the same rate regardless of their mass. This is due to the acceleration due to gravity being constant. This phenomenon is known as the equivalence principle.
In the absence of air resistance, all objects fall with the same acceleration due to gravity, regardless of their mass. This acceleration is approximately 9.81 m/s^2 near the surface of the Earth.