Questions and Answers
What is the definition of free fall?
The motion of an object falling under the sole influence of gravity
What is the acceleration of an object in free fall near the surface of the Earth?
$9.81 m/s^2$
What happens to an object's velocity during free fall?
It increases at a constant rate
What is the air resistance experienced by an object in free fall?
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What is the acceleration of an object in free fall near the surface of the Earth?
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What is the impact of air resistance on an object in free fall?
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What is the main factor affecting the velocity of an object in free fall?
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What determines the rate of acceleration for an object in free fall?
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Study Notes
Free Fall
- Free fall is defined as the motion of an object under the sole influence of gravity, with no other forces acting on it.
Acceleration in Free Fall
- The acceleration of an object in free fall near the surface of the Earth is 9.8 m/s².
- This acceleration is constant and downward, directed towards the center of the Earth.
Velocity in Free Fall
- During free fall, an object's velocity increases as it accelerates downward.
- The velocity of an object in free fall increases by 9.8 m/s every second.
Air Resistance in Free Fall
- An object in free fall experiences air resistance, which opposes its downward motion.
- Air resistance depends on the shape, size, and density of the object, as well as the density of the air.
Impact of Air Resistance
- Air resistance slows down the object's descent, reducing its acceleration.
- In the presence of air resistance, an object's acceleration is less than 9.8 m/s².
Factors Affecting Velocity
- The main factor affecting the velocity of an object in free fall is gravity.
- Air resistance is a secondary factor that affects the velocity of an object in free fall.
Rate of Acceleration
- The rate of acceleration for an object in free fall is determined by the force of gravity.
- The mass of the object does not affect its acceleration in free fall.
