Question

17) A soccer player is redirecting the ball with her foot. At the instant before it is contacted by the player's foot, the bal is moving at a velocity (VB) of 6 m/s in the direction shown in the overhead view on the left below i) (1pt) The player wants to speed up the ball's "forward" motion in its current direction while causing its motion to turn to the left of its current direction. If she is to do so, then of the four directions (A - D) shown in the figure on the right below, in which direction should the player accelerate the ball? x (forward) (forward) y (left) y (left) continued on next page)

Answer 1

1. A direction

2. It depends on angle between A direction and x-direction.

Let angle is D degree.

Velocity final=( 6 + 600*0.015cosD)i^{^} + 600*0.015sinDj^{^}

= 6+9cosDi^ + 9sinDj^ m/s

i^ is unit vector along x direction and j^ is unit vector along y direction.