physics
posted by steve .
While a roofer is working on a roof that slants 36 degrees above the horizontal, he accidentally nudges his 85.0 N toolbox, causing it to start sliding downward, starting from rest. If it starts 4.25m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 22.0 N?

Well, first find the net accelerating force
Net accelerationforce= weight down the plane  friction
mgSinTheta  22
Set that equal to mass*acceleration and solve for acceleration.
then:
Vfinal^2=Vinitial^2+2*a*d
(Vinitial is zero
solve for Vfinal 
23
Respond to this Question
Similar Questions

Physics
*I am lost on a bunch of different problems, and this is one of them. Please note that I am NOT asking for final answers, just some guidance so that I can figure out how to do the problem!!! I know that a lot of times on this site … 
Physics
You lose your footing and slide of of your roof. Fortunately, you have placed a safety net whose center is positioned at a horizontal distance of 4.15m, measured from a point directly below the edge of the roof and indeed you land … 
physics
The roof on a house rises 1.50 m over a horizontal diestance of 3.50 m. A 72.9kg roofer stands on the roof. Is the frictional force that keeps the roofer from slipping equal in magnitude to F perpendicular or F paralell? 
Physics
After delivering his toys in the usual manner, Santa decides to have some fun and slide down an icy roof. The roof is 7 m in length and makes an angle of 41° with the horizontal. He starts from rest at the top of the roof and accelerates … 
physics
While a roofer is working on a roof that slants at 45.0 degrees above the horizontal, he accidentally nudges his 94.0 N toolbox, causing it to start sliding downward, starting from rest. 
physics
A large building has an inclined roof. The length of the roof is 69.5 m and the angle of the roof is 18.0° below horizontal. A worker on the roof lets go of a hammer from the peak of the roof. Starting from rest, it slides down the … 
physics
While a roofer is working on a roof that slants at 43.0 above the horizontal, he accidentally nudges his 88.0 toolbox, causing it to start sliding downward, starting from rest.If it starts 5.00 from the lower edge of the roof, how … 
Southern Union
A large building has an inclined roof. The length of the roof is 64.0 m and the angle of the roof is 20.0° below horizontal. A worker on the roof lets go of a hammer from the peak of the roof. Starting from rest, it slides down the … 
Physics
A snowball off a roof that slopes downward at an angle of 40degrees. The edge of the roof is 14 m above the ground and the snowball has a speed of 8 m/s as it rolls off the edge of the roof. If a 1.8 m tall man is standing 4 m from … 
College Physics
A snowball off a roof that slopes downward at an angle of 40degrees. The edge of the roof is 14 m above the ground and the snowball has a speed of 8 m/s as it rolls off the edge of the roof. If a 1.8 m tall man is standing 4 m from …