Physics Help Forum pls help with this Q. force up inclined hill
 User Name Remember Me? Password

 Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

 Aug 14th 2008, 07:31 AM #1 Junior Member   Join Date: Aug 2008 Posts: 2 pls help with this Q. force up inclined hill a 100 kg trollley is being pushed up a rough 30degree incline by a constant force, F. the frictional force Ft between the incline and the trolley is 110N. determine the value of F that will move the trolley up the incline at a constant velocity of 5ms^1? thanks my 1st time on this forum.
Aug 14th 2008, 07:57 AM   #2

Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,811
 Originally Posted by usagi a 100 kg trollley is being pushed up a rough 30degree incline by a constant force, F. the frictional force Ft between the incline and the trolley is 110N. determine the value of F that will move the trolley up the incline at a constant velocity of 5ms^1? thanks my 1st time on this forum.
I can't do much unless I know what direction the applied force is in. For example, the two common directions are directly up the slope or horizontally.

The general description of how to attack this problem is the following: set up a coordinate system such that +x is up (or down) the slope and +y is perpendicular to the slope and upward (in the direction of the normal force.) Now resolve your forces into components in these directions. Now apply Newton's 2nd Law in both coordinate directions. Actually in this case all you will need is the x direction.

If you need more help than this, let me know the direction of F and we'll get into more detail.

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.

 Tags force, hill, inclined, pls

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post sadistprincess Kinematics and Dynamics 3 Sep 10th 2013 06:51 PM olski1 Kinematics and Dynamics 1 Mar 21st 2010 08:59 AM chaoticphysics Kinematics and Dynamics 1 Mar 31st 2009 10:06 PM ryansulzman Kinematics and Dynamics 1 Mar 14th 2009 11:34 PM f8pc Energy and Work 2 Nov 15th 2008 09:10 PM