Go Back   Physics Help Forum > Lobby > New Users

New Users New to PHF? Post up here and introduce yourself!

Like Tree1Likes
  • 1 Post By ChipB
Reply
 
LinkBack Thread Tools Display Modes
Old Sep 11th 2016, 05:57 PM   #1
Junior Member
 
Join Date: Sep 2016
Posts: 1
Mastering Physics help!

A rock is kicked horizontally at v0 = 19 m/s from a hill with a 45∘ slope. How long does it take for the rock to hit the ground?
nrahman1 is offline   Reply With Quote
Old Sep 12th 2016, 07:53 AM   #2
Physics Team
 
ChipB's Avatar
 
Join Date: Jun 2010
Location: Morristown, NJ USA
Posts: 2,347
The rock hits the side of the 45 degree slope when its horizontal displacement equals its vertical displacement - do you see why that is? The rock's horizontal displacement as a function of time is x(t) = v_0 t, and its vertical displacement is y(t) = (1/2)gt^2. Set these equal, and solve for t.
HallsofIvy likes this.
ChipB is offline   Reply With Quote
Reply

  Physics Help Forum > Lobby > New Users

Tags
mastering, physics



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
Mastering Physics question Solid8Snake Kinematics and Dynamics 3 Sep 27th 2009 03:04 AM
Mastering Physics car moving off a cliff Solid8Snake Kinematics and Dynamics 1 Sep 21st 2009 12:31 AM
Mastering Physics question Solid8Snake Kinematics and Dynamics 1 Sep 7th 2009 10:05 PM
Mastering Physics practice question Solid8Snake Kinematics and Dynamics 10 Sep 6th 2009 10:28 PM
liquid tension problem.. from mastering physics.. khonics89 Thermodynamics and Fluid Mechanics 0 Aug 25th 2009 03:50 AM


Facebook Twitter Google+ RSS Feed