2. A wooden block slides directly down an inclined plane, at a constant velocity of 6 m/s.
a. How large is the coefficient of kinetic friction if the plane makes an angle of 25º with the horizontal? 0.466
b. If the angle of incline is changed to 10º, how far will the block slide before coming to a stop? 64.3 m
2 answers
i know the answers but i don't know they process
There are two forces here:
gravity down the slope: mgSinTheta
friction up the slope: mg*mu*CosTheta
at constant velocity, these are equal.
b. friction will be greater than gravity...so it has the initial velocity, so net force up (friction-gravity)*times distance must equal the initial KE. Solve for distance.
gravity down the slope: mgSinTheta
friction up the slope: mg*mu*CosTheta
at constant velocity, these are equal.
b. friction will be greater than gravity...so it has the initial velocity, so net force up (friction-gravity)*times distance must equal the initial KE. Solve for distance.
3 answers