Alight, inextensible cord passes over a light, frictionless pulley with a radius of 8.9 cm. it has a 19 kg mass on the left and a 2.6 kg mass on the right, both hanging freely. initially their center of masses are a vertical distance 3.8 m apart. the acceleration due to gravity is 9.8 m/s^2. at what rate are the two masses accelerating when they pass each other? answer in units of m/s^2. what is the tension in the cord when they pass each other? answer in units of n.

Four objects are being tested to see how they are affected by fluid friction. object w has a surface area of 4.5 cm2, object x has a surface area of 2.5 cm2, object y has a surface area of 6.2 cm2, and object z has a surface area of 3 cm2. which object would experience the most fluid friction?

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.