headshrinker
Jan8-10, 11:09 AM
1. The problem statement, all variables and given/known data
a 0.75kg brick is released from rest and slides down an inclined roof pitched at 30 degrees to the horizontal. the brick slides 2.5m before striking the gutter and the coefficient of friction between the roof and the brick is 0.3. determine the velocity at which the brick strikes the gutter.
2. Relevant equations
v^2=u^2 + 2as
3. The attempt at a solution
i know the answer is 3.43m/s but the closest i've come is 1.45m/s. please help as this revision for an exam next week! :-(
thanks!
a 0.75kg brick is released from rest and slides down an inclined roof pitched at 30 degrees to the horizontal. the brick slides 2.5m before striking the gutter and the coefficient of friction between the roof and the brick is 0.3. determine the velocity at which the brick strikes the gutter.
2. Relevant equations
v^2=u^2 + 2as
3. The attempt at a solution
i know the answer is 3.43m/s but the closest i've come is 1.45m/s. please help as this revision for an exam next week! :-(
thanks!