|

Mechanics

Hot goIITian

 Joined: 19 Jul 2009 Post: 166
12 Feb 2011 11:46:20 IST
0 People liked this
1
591
Minimum Velocity ? [2D-Motion]
Engineering Entrance , Medical Entrance , AIPMT , JEE Main , AIIMS , JEE Advanced , Physics , Mechanics , Kinematics , NewtonsLawsCirMotion , Work Power Energy collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

A projectile passes thru the point (3,4). Then the minimum velocity of projection required=? If it is thrown from the origin?

Blazing goIITian

Joined: 22 May 2009
Posts: 2467
25 May 2012 12:11:58 IST
0 people liked this

ucos@t=3

usin@t-0.5*g*t^2=4

u^2*tan@*3-0.5*g*9*sec^2@=4*u^2

u^2(tan@-4)=45sec^2@

du/dt=90*sec^2@tan@/4-tan@+45sec^4@/(tan@-4)^2

du/dt=0

put above equal to zero to get @ and put in 1st to get the u

 Some HTML allowed. Keep your comments above the belt or risk having them deleted. Signup for a avatar to have your pictures show up by your comment If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team

## For Quick Info

Name

Mobile

E-mail

City

Class

Vertical Limit

Top Contributors
All Time This Month Last Week
1. Bipin Dubey
 Altitude - 16545 m Post - 7958
2. Himanshu
 Altitude - 10925 m Post - 3836
3. Hari Shankar
 Altitude - 9960 m Post - 2185
4. edison
 Altitude - 10815 m Post - 7797
5. Sagar Saxena
 Altitude - 8625 m Post - 8064
 Altitude - 6330 m Post - 1979

Physics

Topics

Mathematics

Chemistry

Biology

Institutes

Parents Corner

Board

Fun Zone