Dada la situación de la gráfica, calcular la aceleración del bloque de 20kg soportado por una superficie inclinada 30º si se sabe que entre las superficies en contacto hay un coeficiente de rozamiento de 0,1.​

be subject to a force andchange its motion

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.