physics: free fall

What is free fall?

Free fall occurs when only gravitational force acts on an object.

What is the acceleration due to gravity (g) on Earth?

9.81 m/s².

Do heavier objects fall faster than lighter objects in free fall?

No, all objects fall at the same rate without air resistance.

What happens to an object's displacement in free fall with respect to time?

Displacement is proportional to time squared (t²).

What is the equation for displacement in free fall?

Ax = vᵢ t + ½ a t².

What is the equation relating final velocity to initial velocity in free fall?

v = vᵢ + at.

What is the velocity of a free-falling object at 3 seconds?

-29.4 m/s.

How is acceleration characterized in free fall?

Acceleration is constant at -9.81 m/s².

What is the initial velocity of an object dropped in the volleyball drop problem?

6.0 m/s upward.

If an object is dropped from 25.0 m, what must be calculated?

Velocity before impact and time to reach the ground.

What key concept is emphasized about the motion of all objects in free fall?

Same acceleration for all objects regardless of mass.

At what point in the trajectory is acceleration still considered constant?

Even at the highest point of the trajectory.

What is free fall?

Free fall is motion under the influence of gravity alone, with negligible air resistance.

What is the acceleration due to gravity (g) on Earth?

The acceleration due to gravity on Earth is approximately 9.8 m/s².

How does free fall differ from other forms of acceleration?

In free fall, the only force acting is gravity, whereas other forms of acceleration may involve additional forces.

How does velocity change during free fall?

During free fall, velocity increases downward with time.

What do freely falling objects experience?

Freely falling objects experience constant acceleration due to gravity.

What is the velocity of an object in free fall after 2 seconds?

The velocity of a freely falling object increases as it falls, calculated using the equation v = vᵢ + at.

What can be calculated to find the time it takes for an object to reach the ground when dropped from a height?

The height, initial velocity, and acceleration can be used to calculate the time to reach the ground.

How are kinematic equations applied to free-falling objects?

The same kinematic equations used for uniform acceleration apply to free-falling objects.

What does the acceleration-time graph of a freely falling object look like?

The acceleration-time graph of a freely falling object is a horizontal line at -9.8 m/s².

How can one determine the maximum height reached by an object thrown upward?

The maximum height can be calculated using kinematic equations specific to motion under acceleration.