A60-m-long chain hangs vertically from a cylinder attached to a winch. assume there is no friction in the system and that the chain has a density of 10 kg/m. use 9.8 m divided by s squared for the acceleration due to gravity. a. how much work is required to wind the entire chain onto the cylinder using the winch? b. how much work is required to wind the chain onto the cylinder if a 35-kg block is attached to the end of the chain?

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.