NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/
August 12, 2020, 11:57:27 am *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
   Home   Help Search Login Register  
The softest thing overcomes the hardest thing in the universe. ...Lao Tzu (570-490 BC)
Google Bookmarks Yahoo My Web MSN Live Netscape Del.icio.us FURL Stumble Upon Delirious Ask FaceBook

Pages: [1]   Go Down
Author Topic: Physics projectile  (Read 11123 times)
0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
Offline Offline

Posts: 1

Embed this message
on: November 24, 2008, 06:03:44 am »

A projectile is launched straight up at 141 m/s. How fast is it moving at the top of the trajectory? Suppose it is launched upward at 45 degrees above the horizontal plane. How fast is it moving at the top of its curved trajectory?
Hero Member
Offline Offline

Posts: 1796


Embed this message
Reply #1 on: November 24, 2008, 08:32:45 am » posted from:SINGAPORE,SINGAPORE,SINGAPORE

goto http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=745.msg2801#msg2801

use the applet embedded or
the jar file http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=745.0;attach=372

u = 141 m/s
alpha = 45 degree

select from menu to visualize the quality
ux =
vx =

click play

what do you notice about the vx (instantaneous velocity in x direction ) ?

hint: vx = 100 m/s
extra fact: notice vx = 100 m/s = ux (initial velocity in x direction) because it is a motion in x direction without any acceleration ( ax )  so it is unchanged Smiley
« Last Edit: November 24, 2008, 08:36:04 am by lookang » Logged
Fu-Kwun Hwang
Hero Member
Offline Offline

Posts: 3085

Embed this message
Reply #2 on: November 24, 2008, 07:41:43 pm »

If air resistance is not considered in projectile motion. The only external force is gravitation force.
So projectile only accelerate in the vertical direction and the horizontal velocity is constant.
Pages: [1]   Go Up
The softest thing overcomes the hardest thing in the universe. ...Lao Tzu (570-490 BC)
Jump to:  

Related Topics
Subject Started by Replies Views Last post
projectile motion
Examples for beginner who want to learn EJS
Fu-Kwun Hwang 0 17292 Last post August 18, 2006, 02:22:47 pm
by Fu-Kwun Hwang
Projectile Motion
lookang 3 12016 Last post May 17, 2019, 03:09:45 pm
by angelinajolie
Physics animations (site)
Request for physics Simulations
Billy12 8 19055 Last post September 05, 2008, 04:38:58 am
by Billy12
Projectile Orbits and Satellite orbits
ahmedelshfie 1 5658 Last post September 24, 2010, 07:17:03 pm
by ahmedelshfie
Powered by MySQL Powered by PHP Powered by SMF 1.1.13 | SMF © 2006-2011, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
Page created in 0.051 seconds with 23 queries.since 2011/06/15