An amusement park ride consists of a rotating circular platform 11.4 m in diameter from which 10 kg seats are suspended at the end of 1.54 m massless chains. When the system rotates, the chains make an angle of 32.3 ◦ with the vertical. What is the speed of each seat?

Aprojectile is launched horizontally 10m above the ground and with an initial velocity of 15 m/s. a) sketch the trajectory using an appropriate coordination system. b) how long for the projectile to reach the ground. c) how far did projectile travel horizontally before striking the ground. d) determine the projectilex & y position at t-1.3s e) determine the magnitude and direction of projectile velocity at t= 1.3s f) determine the magnitude and direction of projectile acceleration at t-1.3s

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity

Atomic nuclei of almost all elements consist of