3. A sailor pushes a 160.0 kg crate up a ramp that is 250 m high and 15.0 m long onto a loading dock. He exerts a 620.0 force parallel to the ramp a) What is the mechanical advantage of the ramp? b) What is the efficiency of the ramp? Your response should include all of your work and a free body diagram

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Work = force × a. work b. energy c. distance d. momentum