si el valor de la masa 1 es de 76kg y rl coeficiente de friccion cinetica es de 0.37. ¿Cual seria el valor maximo de la masa2 que se puede colgar en el sistema manteniondolo en reposo?

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

In science and physics what is the standard unit of measure for speed?