a lawnroller is rolled across a lawn by a force of 115 N along the direction of the handle. the handle makes an angle of 22.5*(that star means degree, i couldn't find any degree sign on my keyboard) with respect to the horizontal. if the person exerts 64.6 watts of power for 90.0 seconds, what is the distance the lawnroller travels?
2007-01-09 10:35:18 · 1 answers · asked by lincolngomes301 2 in Science & Mathematics ➔ Physics
First, find the amount of work done using the equation
Power = work/time => (Power)(time) = work = (64.6 W)(90.0s) =
5814 J of work
Next, find the amount of force that is applied horizontally along the ground. The total force is 115 N, but the horizonal force is only 115 N(cos 22.5) = 106 N
Now use the equation W = Fd to find the distance.
5184 J = (106 N)(d) => d = 5184 J/106 N = 48.9 meters.
2007-01-09 10:46:28 · answer #1 · answered by Nicknamr 3 · 0⤊ 0⤋