Un tren parte del reposo y acelera uniformemente a 4,0 m/s2; ¿cuánto tarda en recorrer los primeros 200 m?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?