gneill said:
The Earth didn't move?ravsterphysics said:
Acceleration is the rate of change of an object's velocity, while speed is the measure of how fast an object is moving. In other words, acceleration measures the change in speed over time.
Acceleration is calculated by dividing the change in velocity by the change in time. This can be represented by the equation a = (vf - vi) / t, where a is acceleration, vf is final velocity, vi is initial velocity, and t is time.
Gravity is a force that causes objects to accelerate towards the Earth at a constant rate of 9.8 meters per second squared. This means that all objects will fall towards the Earth at the same rate regardless of their mass.
Yes, acceleration can be negative. This means that an object is slowing down or changing direction in the opposite direction of its initial motion. For example, a car braking has a negative acceleration.
Air resistance, also known as drag, can act in the opposite direction of an object's motion and therefore slow it down. This results in a decrease in acceleration. The amount of air resistance an object experiences depends on its shape, size, and speed.