Caroline(45kg) is riding looping roller coaster(radius = 25 m) at cedar point. At the bottom of the loop she has a speed of 30m/s. what is the normal force of her seat on Caroline?

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

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=?