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require_once JPATH_SITE.'/TTcustom/TT_contentparser.php';\(parameters = array("topicname" => "02_newtonianmechanics_2kinematics", "modelname" => "ejss_model_freefall01sec");echo generateSimHTML(\)parameters, "EJSS");
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Worksheet
Examples
From Dave and Gavin,
1.A sky diver jumps out of a hovering helicopter. A 2 seconds afterwards another sky diver jumps out and they both fall along the same vertical line. Ignore air resistance so that both sky divers fall with the same acceleration.
a.Does the difference in their speeds stay the same throughout the fall?
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| https://iwant2study.org/ospsgx/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/37-kinematics-in-y-direction |
suggested answer: after t =2 s, the difference is always the same difference as shown by the constant difference.
b.Does the vertical distance between them stay the same throughout the fall?
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| https://iwant2study.org/ospsgx/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/37-kinematics-in-y-direction |
suggested answer: after t =2 s, the difference in position increases as shown by the increasing difference of YELLOW minus BLUE line.
Question 2
2.A tennis ball thrown from the top of a building is given an initial velocity of 20 m/s straight upward. The building is 50 m high, and the ball just misses the edge of the roof on its way down. Using t = 0 as the time the ball leaves the thrower’s hand, determine
a.the time at which the ball reaches its maximum height
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| https://iwant2study.org/ospsgx/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/37-kinematics-in-y-direction |
suggested answer: t = 2.0 s
b.the maximum height
suggested answer: H maximum = 70.4 m
c.the time at which the ball returns to the height from which it was thrown
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| https://iwant2study.org/ospsgx/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/37-kinematics-in-y-direction |
suggested answer: t = 4.0 or 4.1 s
d.the velocity of the ball at this instant
suggested answer: v = -20.2 m/s
e.the velocity and position of the ball at t = 5 s
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| https://iwant2study.org/ospsgx/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/37-kinematics-in-y-direction |
Versions
- http://weelookang.blogspot.sg/2016/01/ejss-free-fall-simulation-added-more.html Blogpost on more cases added
- http://weelookang.blogspot.sg/2014/03/ejss-kinematics-in-y-model.html Blogpost on JavaScript version by Loo Kang Wee
- http://weelookang.blogspot.sg/2013/12/ejss-free-fall-model.html Blogpost on JavaScript version by Loo Kang Wee
- http://weelookang.blogspot.sg/2013/12/ejss-kinematics-model.html template objects from lookang
- http://weelookang.blogspot.sg/2010/09/ejs-open-source-bouncing-ball-with-drag.html Blogpost on Java vesion by Loo Kang Wee and Fu-Kwun Hwang
- http://weelookang.blogspot.sg/2010/06/ejs-open-source-kinematics-java-applet.html
- http://www.compadre.org/osp/items/detail.cfm?ID=13050 Physlet One-Dimensional Kinematics Illustrations Package by Andreu Glasmann, Wolfgang Christian, and Mario Belloni
Other Resources
- http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=421.0 Elastic bouncing ball Java Version by Fu-Kwun Hwang
- http://butikov.faculty.ifmo.ru/Projects/Falling_bodies.html#_applet Falling Object Java 3D version by Eugene Butikov
- http://www.opensourcephysics.org/items/detail.cfm?ID=10001 Free Fall Model by Andrew Duffy
Other Hands-on kit
- https://sites.google.com/site/iprofmeca/session-1-free-fall by This email address is being protected from spambots. You need JavaScript enabled to view it.
Project related:
Understanding Teacher Learning Community as Support for Implementation of Open Source Physics for Conceptual Instruction
Project Number: OER 10/15 GWF
Project Duration: 01 July 2015 - 30 April 2017
http://weelookang.blogspot.sg/2015/07/understanding-teacher-learning.html
Family of Resources
| Primary | Junior College |
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