FizziksGuy Posted April 19, 2013 Share Posted April 19, 2013 File Name: WS: Momentum and MotionFile Submitter: FizziksGuyFile Submitted: 19 Apr 2013File Category: Momentum & ImpulseProblem set combining conservation of momentum, projectile motion, and friction. Quote Link to comment Share on other sites More sharing options...
nucgirl Posted January 27, 2017 Share Posted January 27, 2017 If there is friction on this problem then the first box would also experience a reduction in velocity making this a calculus problem. You cannot calculate the frictional force without more information. The second question implies that the third question should be solved by using forces, but the coefficient of friction is missing. Work-energy is not possible. Quote Link to comment Share on other sites More sharing options...
FizziksGuy Posted January 28, 2017 Author Share Posted January 28, 2017 Good Afternoon, This is designed as a problem to compliment the Regents and Honors programs of study with this website (hence its location in the Regents and Honors folder), in which the coefficient of friction for wood on wood is a given and is designed to be looked up in a reference table (see link below). And yes, the first box would experience friction, however, based on the problem statement, you know the velocity of the first block as it contacts the second block, therefore there's no need to calculate a reduction in velocity prior to impact. Then, following the impact, and knowing the coefficient of kinetic friction of wood on wood, you can solve for the horizontal launch velocity using Newton's 2nd Law, at which point this becomes a projectile problem. Links to reference table with friction information: http://www.aplusphysics.com/courses/honors/dynamics/friction.html I would agree, however, that if you didn't know the coefficient of friction, you'd be stuck. Quote Link to comment Share on other sites More sharing options...
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