A dolphin jumps with an initial velocity at an angle 40 degree above the horizontal. The dolphin passes through the center of a hoop before returning to the water. If the Dolphin is moving horizontally when it goes through the hoop how high above the water is the center of the hoop?

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

If a balloon is taken outside on a very cold day, what will occur?

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n