A pulley system is such that a person pulls down with 10 N of force to lift a 20 N object. The machanical advantage is..
(MA = Fout/Fin)
O 0.5
O 2
O
30
Please help me

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s. what is the wavelength?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.

Which of these is the best way to manage a natural resource