Question
A girl throws a ball at a fence 10m away. The ball is 2m from the ground when it
leaves her hand with an initial velocity of v=8 i+8 j m/s. When the ball hits the
fence its horizontal velocity component is reversed (the vertical velocity component
is unchanged). Where does the ball hit the ground?
leaves her hand with an initial velocity of v=8 i+8 j m/s. When the ball hits the
fence its horizontal velocity component is reversed (the vertical velocity component
is unchanged). Where does the ball hit the ground?
Answers
MathMate
Calculat the distance d (metres) it hits the ground when there is no wall. Use reflection to calculate the bounce off the wall.
Then
case 1: if d>10 m.
Ball hits ground at (d-10) before the wall.
case 2: if d<10 m.
Ball hits ground at d m. from the girl.
Then
case 1: if d>10 m.
Ball hits ground at (d-10) before the wall.
case 2: if d<10 m.
Ball hits ground at d m. from the girl.