En un almacen de maquinas se emplea una prensa hidraulica para levantar equipo pesado para repararlo. El sistema tiene un piston pequeño cuya seccion transversal tiene un area de 0,07M^2 y el piston grande una seccion transversal de 0,21M^2 de area. Un motor que pesa 2700N descansa sobre el pistón grande ¿Que fuerza se debe aplicar sobre el piston pequeño para que levante el motor

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.