is a fascinating phenomenon where objects move solely under the influence of gravity. This topic explores the kinematics of , using modified equations to describe an object's motion as it accelerates downward at 9.8 m/s².
We'll dive into how position, , and acceleration change during free fall. By understanding these concepts and applying the right equations, you'll be able to analyze and predict the motion of falling objects in various scenarios.
Free Fall Kinematics
Kinematic equations for free fall
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Position of object in free fall changes parabolically with time due to changing velocity
Initially moving upward, continues to rise until velocity reaches zero, then falls back down (tossed coin, jumping athlete)
Initially moving downward, continues to move downward at increasing rate (falling hailstone, dropped book)
Calculations in free fall analysis
Calculate object's position, velocity, or acceleration at specific time during free fall:
Identify known variables like initial position (y0), initial velocity (v0), acceleration due to gravity (g), and time (t) at which to calculate unknown variable
Choose appropriate kinematic equation including unknown variable to calculate
Substitute known values into equation and solve for unknown variable
Example calculating velocity after 2 seconds for object dropped from 50 m height:
Given: y0=50m, v0=0m/s, g=9.8m/s2, t=2s
Choose equation: v=v0−gt
Substitute values: v=0−(9.8)(2)
Solve: v=−19.6m/s, object moving downward at 19.6 m/s after 2 seconds (falling stone, skydiver)
Related concepts in free fall
explain the constant acceleration in free fall due to the gravitational force
Gravitational potential energy decreases as an object falls, converting to kinetic energy
applies in free fall, with total mechanical energy remaining constant in ideal conditions
combines free fall with horizontal motion, resulting in parabolic trajectories
In real-world scenarios, affects free fall by opposing motion and potentially leading to