Determine the acceleration of a car of mass 900 kg, when a net force of 2700 N acts on it.​

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.

Explain vector addition, triangle method and parallelogram method

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?