- #1
Stalker23
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So i have multiple teachers giving me different answers to this question.
A block of mass (m) is initially sliding up a ramp at an incline of (Theta) at an initial speed (V0). The coefficient of kinetic friction between the ramp and block is (Uk), and and the coefficient of static friction is (Us).
The questions i have are
1) Does force vector for friction change direction when the block changes direction?
2) When the block is stopped for an instant does teh coefficient of static friction matter?
Lets say you wanted to see how fast the block were moving after (t) seconds, you could do it using Newtons Laws or the Laws of conservation of energy.
---the first question effects the Both Methods for solving the problem.
---the second question matters because you may need to check to make sure the block will slid down the ramp after reaching the top.
Thankyou
...my dynamics teacher told me that friction DOES NOT CHANGE DIRECTION (Dr. Hendricks of Virginia Tech ESM)
A block of mass (m) is initially sliding up a ramp at an incline of (Theta) at an initial speed (V0). The coefficient of kinetic friction between the ramp and block is (Uk), and and the coefficient of static friction is (Us).
The questions i have are
1) Does force vector for friction change direction when the block changes direction?
2) When the block is stopped for an instant does teh coefficient of static friction matter?
Lets say you wanted to see how fast the block were moving after (t) seconds, you could do it using Newtons Laws or the Laws of conservation of energy.
---the first question effects the Both Methods for solving the problem.
---the second question matters because you may need to check to make sure the block will slid down the ramp after reaching the top.
Thankyou
...my dynamics teacher told me that friction DOES NOT CHANGE DIRECTION (Dr. Hendricks of Virginia Tech ESM)