Physics Help Forum Challenge Problem-Text Book motion on an inclined plane

 Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

 Sep 21st 2009, 07:33 PM #1 Junior Member   Join Date: Apr 2009 Posts: 20 Challenge Problem-Text Book motion on an inclined plane I really need help with this question, Im not sure what to do with the velocity value or what to even plug in to solve for the angle. I think the acceleration is -9.8sin20, but I could be wrong. Could someone plz post an approach to this problem. Thx in advance Attached Thumbnails
 Sep 21st 2009, 11:27 PM #2 Physics Team   Join Date: Feb 2009 Posts: 1,425 You are right . The accln down the plane is -9.8 sin 20. Now imagine you are on a planet with g = -9.8 sin 20 and solve as usual for the desired range
 Sep 22nd 2009, 04:26 AM #3 Junior Member   Join Date: Apr 2009 Posts: 20 I don't understand how to solve it though. Like aren't we suppose to derive component velocities from a specific angle. I don't understand which formula could be used to incorporate the distance and an angle or even if the components are needed for the velocity.
 Sep 22nd 2009, 05:08 AM #4 Physics Team   Join Date: Feb 2009 Posts: 1,425 The vertical component is v sin theta, the horz component is v cos theta. Quite a few such problems have been recently solved here. The only difference being the value of g in this case. I suggest you check the links

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