Butch, the 72-kg star quarterback of Belmont High School's football team, collides with Trask, a stationary left tackle, and is brought to a stop with an acceleration of -20 m/s2 . What force does Butch exert on Trask?

At what time will the interfering waves have an amplitudeof zero?

What causes the development of most clouds and precipitation in the atmosphere?

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?