Dos bloques de masa m1= 5kg y m2=2kg, con m1 > m2 , se colocan en contacto mutuo sobre una superficie horizontal sin fricción, como se muestra en la figura. Una fuerza horizontal constante F= 23 N. Se aplica a la m1 como se muestra. A) Encuentre la magnitud de la aceleración del sistema.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Cardiac muscle causes movement in the bone.