Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Introductory Physics Homework Help
Homework Help based on the equations of motion
Reply to thread
Message
[QUOTE="risingabove, post: 4513577, member: 488739"] [h2]Homework Statement [/h2] A particle is projected vertically upwards at 30 m/s. Calculate (a) how long it takes to reach its maximum height, (b) the two times at which it is 40 m above the point of projection, (c) the two times at which it is moving at 15 m/s.[b]2. Homework Equations [/b final velocity (v) initial velocity (u) acceleration due to gravity (a) = 10m/s^2 time (t) Distance or displacement (s) v^2=u^2 + 2as v=u+at s=ut+1/2 at^2 s=1/2(u+v)t[h2]The Attempt at a Solution[/h2] I first find the maximum height, this is where i used the equation v^2=u^2 +2as 0^2=30^2 + 2(10)s s=45 m maximum height then i used that value and plugged into the equation to find time 45= 1/2 (30+0)t t= 3seconds therefore total time is 3 seconds for the particle to reach its maximum height. part (b) is where i am stuck however i move on to part (c) and i plugged in the values in the equation 15=30-10t t=1.5 seconds however the question asked for two (2) times. so i am also stuck with finding the second time...[/b] [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Homework Help based on the equations of motion
Back
Top