you push a sled of mass 15 kg across the snow with a force of 180 N for a distance of 2.5 m. There is no friction. if the sled started at rest. what is the velocity of the sled after you push it? @ cwrw238

Question

micahm · Answer

Starting from rest, this fist attains a velocity of 8.0 m/s in 0.15 s. ... If a person weighing 650 N now sits on the sled, what applied force is now needed to slide the sled across the snow at constant velocity? ... (no, a is not equal to g) ... If you have a mass of 55 kg and you are in an elevator that that is moving up with constant

micahm · Answer

timmaley.home.mindspring.com/.../APB_Forces_Practice_Problems.doc

anonymous · Answer

the link doesn't lead to anything...

anonymous · Answer

I don't get what you meant in the first post??

anonymous · Answer

there are many useful formulas, but the best is energy because you don't need time:
the work you do (the energy you give to the sled) is the force you make times the distance you do it, and the energy at the end it's just kinetic then:
$$F \times d = \frac{ mv ^{2} }{ 2 }$$ you know the numbers, you can find the answer

anonymous · Answer

okay thanks! :)

anonymous · Answer

so i got 7.75? Would this be right?

anonymous · Answer

yes ;)

anonymous · Answer

okay thanks! :)