A roller coaster goes around one loop in 13.77 seconds. The loop has a radius of 16.234m. The coaster has a mass of 630kg. Find the velocity of the loop and then find the Fn of the roller coaster at the top of the loop.

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Disney, viacom and aol time warner are examples of

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.