Sabemos que, en la Tierra, sobre cualquier cuerpo en reposo, actúa siempre al menos una fuerza, la gravitatoria. ¿Por qué entonces, no se mueve?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

What are similarities and differences between refraction, reflection, diffraction and absorption?