Suppose that a ball is dropped out of a plane and it accelerates towards the ground at approximately 9.8ms^-2. After 4.05s it hits the ground and is travelling at 40ms^-1. At what
speed was it travelling when it left the plane?

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

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?

Which of the following is not am example of a polymer? protein nylon kevlar concreta