<meta http-equiv="refresh" content="1; url=/nojavascript/"> Acceleration Due to Gravity ( Real World ) | Physics | CK-12 Foundation
Dismiss
Skip Navigation

Acceleration Due to Gravity

%
Best Score
Practice Acceleration Due to Gravity
Practice
Best Score
%
Practice Now
The Art of Falling
 0  0  0 Share To Groups

The Art of Falling

Credit: The U.S. Army
Source: http://www.flickr.com/photos/soldiersmediacenter/2990718614/
License: CC BY-NC 3.0

After jumping out of a plane that is flying 10,000 ft above the surface of the Earth, this skydiver reached up to 120 mph before deploying their parachute. Within a matter of seconds the increased surface area allows the pair’s velocity to be slowed to a safe velocity for landing. By using Newton’s 2nd law, you can easily calculate what speed this pair landed at.

New You Can Use

Credit: wales_gibbons
Source: http://www.flickr.com/photos/9678460@N07/7462872938
License: CC BY-NC 3.0

Skydiving would not be possible without parachutes [Figure2]

  • Since the early 1100s, people have been using parachutes to skydive. Even though they didn’t know it, they were using the most basic principles of physics. By using a parachute the effective surface area of the falling body is increased allowing for more air to be “caught”.
  • Effectively designed parachutes will expose a skydiver to 3-4Gs of negative acceleration when the chute is deployed. This causes the skydiver’s velocity to go from 120 mph to roughly 18 mph in a matter of seconds. With the forces balanced, the skydiver will be able to safely land.

Show What You Know

Using the information provided above, answer the following questions.

  1. When the skydiver is falling at a constant velocity after the parachute is open, what is their acceleration?
  2. Explain why it is not advised to use a parachute that is a big as possible, assuming you could safely deploy it?
  3. At what point in the skydiving experience is the acceleration due to gravity equal to zero?

Image Attributions

  1. [1]^ Credit: The U.S. Army; Source: http://www.flickr.com/photos/soldiersmediacenter/2990718614/; License: CC BY-NC 3.0
  2. [2]^ Credit: wales_gibbons; Source: http://www.flickr.com/photos/9678460@N07/7462872938; License: CC BY-NC 3.0

Reviews

Email Verified
Well done! You've successfully verified the email address .
OK
Please wait...
Please wait...
ShareThis Copy and Paste

Original text