A student observes the following correlation: the time a projectile is in the air (t total)increases as the original horizontal speed decreases (vox) and as the original vertical speed(voy) increases. The student wishes to determine which factor (vox and voy), if any, is related to t total in a cause-effect manner. Which experiment could be performed to resolve the issue

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.