Question

A tennis ball rolls 10 meters east when it hits a stone that turns the ball 80 ᵒ N of E

rolling for another 15 m. Calculate magnitude and direction of the resultant displacement of the 

tennis ball.

Answer 1

$x=10+15\cdot\cos80°=12.6\ (m)$

$y=80\cdot\sin80°=78.8\ (m)$

$l=\sqrt{12.6^2+78.8^2}=79.8\ (m)$ . Answer