Cuando una fuerza de 500 N empuja una caja de 25 kg, como se muestra en la figura, la aceleración de la caja al subir por el plano es 0.75 m/s2. Calcule el coeficiente de fricción cinética entre la caja y el plano

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?