My Math Forum [ASK] Kicked Ball

 Physics Physics Forum

 March 13th, 2018, 03:08 AM #1 Senior Member     Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry [ASK] Kicked Ball In a soccer match Putu kicked the ball with the elevation angle $\displaystyle \alpha$ so that it reached the maximum height 10 m. How long must he wait until the ball fall to the ground if g = $\displaystyle 10m/s^2$? I don't know how to do it if the initial velocity isn't known. Can someone help me?
March 13th, 2018, 03:43 PM   #2
Math Team

Joined: Jul 2011
From: Texas

Posts: 2,817
Thanks: 1460

Quote:
 Originally Posted by Monox D. I-Fly In a soccer match Putu kicked the ball with the elevation angle $\displaystyle \alpha$ so that it reached the maximum height 10 m. How long must he wait until the ball fall to the ground if g = $\displaystyle 10m/s^2$?
$\Delta y = v_y \cdot t - \dfrac{1}{2}gt^2$

at the max height, $v_y = 0$ ...

$-10 = 0 - 5t^2$

solve for $t$

 March 13th, 2018, 05:07 PM #3 Senior Member     Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry $\displaystyle t=\sqrt2$? Thanks from skeeter

 Tags ball, kicked

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post zollen Calculus 10 February 20th, 2017 07:30 AM xinglongdada Real Analysis 3 June 8th, 2012 12:13 AM retep Real Analysis 2 March 20th, 2011 07:03 PM cloudtifa Advanced Statistics 0 October 18th, 2010 07:58 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top