Descomponer el vector A=40 n; con un ángulo de 30°, de sus componentes x y y

The objects are acted upon by only one force. gravity. mass times the acceleration of gravity (-9.81meters/second squared).

The answer is frictional force

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )