An object is dropped from a tower, 400400 ft above the ground. the object's height above ground x seconds after the fall is s(x)equals=400400minus−16xsquared2. about how long does it take the object to hit the ground? what is the object's velocity at the moment of impact?

What is the measure of a change in an objects velocity?

If y gets smaller as x gets bigger and y have an relationship?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.