2) A 2-kg cube slides down a 30 degree frictionless incline that is 3 m long. This cube starts has an initial speed of 2 m/s that is directed along the incline. Once it emerges from the incline on to the frictionless flat ground, this cube collides elastically with a 3-kg traveling 3 m/s in the other direction. The 2-kg cube is traveling to the right, and the 3-kg cube is traveling to the left. a) Using the conservation of energy, find the final velocity of the 2-kg cube at the bottom of the incline. b) What are the final velocities of both cubes after the collision?
3) How many fully submerged cylindrical barrels (assume massless) having a height of 851 mm and a diameter of 572 mm are necessary to raise the 42028055 kg Titanic? Assume that only 10% of 131186 m3 of its volume contributes to its buoyancy. The density of sea water is 1030 kg/m3 .
4) A wheel that has radius of 0.2 m has an initial translational speed of 20 m/s such that wheel is going in the counter-clockwise direction. When a clockwise constant angular acceleration of 10 rad/sec2 , how many revolutions does it travel in 10 seconds?
This material may consist of step-by-step explanations on how to solve a problem or examples of proper writing, including the use of citations, references, bibliographies, and formatting. This material is made available for the sole purpose of studying and learning - misuse is strictly forbidden.
By purchasing this solution you'll be able to access the following files: