You and your partner each have an inflated balloon attached to a string. If you each rubbed your balloon against your hair and then, holding them by their strings, brought them close together, they would

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

Plss anybody know how to do this? ? i need the answers from a through d

What is the mass of the same rock on the earth