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beautiful video
at problem 11, shouldn't it be 5m/s since v=sqr of 200J/2x4kg ?
oh nevermind I found my mistake
in question no.2, why is it cos180?
Gravity is pointing in the opposite direction of where the object is heading. IE it would be 180 degrees or going the opposite direction. You can visualize or draw the graph of forces and see for yourself.
beautiful video
at problem 11, shouldn't it be 5m/s since v=sqr of 200J/2x4kg ?
oh nevermind I found my mistake
in question no.2, why is it cos180?
Gravity is pointing in the opposite direction of where the object is heading. IE it would be 180 degrees or going the opposite direction. You can visualize or draw the graph of forces and see for yourself.