Problem $15\mathrm{.}77$

Two smooth disks ${?}_A$ and ${?}_B$ each have a mass of $0\mathrm{.}5$ kg $.$ Both disks are moving with the velocities shown when they collide. The coefficient of restitution is $=0\mathrm{.}75.$ Suppose that ${?}_{(0.{)}_1}=7\frac{m}{s},$

$(v_B)=5\frac{m}{s}$

Part A

Determine the magnitude of the final velocity of A just after collision.

Express your answer to three significant figures and include the appropriate units.

ANSWER:

Part B

Determine the angle between the ${?}_x$ axis and the final velocity of ${?}_A$ just after the collision, measured counterclockwise from the positive ${?}_x$ axis.

Express your answer using three significant figures.

ANSWER:

Part C

Determine the magnitude of the final velocity of ${?}_B$ just after collision.

Express your answer to three significant figures and include the appropriate units.

ANSWER:

$(v_B{)}_2=$