Two shuffleboard disks of equal mass, one orange and the other yellow, are invol

Question

Two shuffleboard disks of equal mass, one orange and the other yellow, are involved in an elastic, glancing collision. The yellow disk is initially at rest and is struck by the orange disk moving with a speed of 5.60 m/s. After the collision, the orange disk moves along a direction that makes an angle of 38.0 degree with its initial direction of motion. The velocities of the two disks are perpendicular after the collision. Determine the final speed of each disk. A billiard ball moving at 6.00 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 5.39 m/s at an angle of 26.0 degree with respect to the original line of motion. Assuming an elastic collision (and ignoring friction and rotational motion), find the struck ball's velocity after the collision. A water molecule consists of an oxygen atom with two hydrogen atoms bound between the two bonds is 107 degree. If the bonds are 0.0900 nm long, where is the center of mass of the molecule? (Take the origin to be the center of the oxygen atom and the x axis to be along the dotted line.)

Explanation / Answer

7)

since it is elastic collision

velocities interchange along the line of impact

so

velocity of orange disc

Vo = u cos38

V0 = 4.41 m/s

velocity of yellow disc

Vy = u sin38

Vy = 3.447 m/s

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