February 24, 2017

Homework Help: PHYSIC help!

Posted by michelle on Thursday, September 30, 2010 at 7:27pm.

a cart is pushed uphill on a ramp, goes up and momentarily stops, and then goes back down. predict the position vs. time, velocity vs. time, and the acceleration vs. time for this.

IDK how to do this!

i tried on the first one. on the graph, i have it looking like an upside-down U and the top of the hill is where it momentarily stops. and then as it goes down the hill, its going backwards.

what do i do for velocity and acceleration??
is the velocity + when going uphill? what about the acceleration? and is the velocity - when going downhill? and again, what does acceleration do??

i tried to ask for help, but no one has really taken the time to explain. it would be MUCH APPRECIATED if you could help me out!

Thanks!!! :)

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