A golf ball is hit off a tee at the edge of a cliff. Its x and y coordinates as functions of time are given by the following expressions: $x=-(18.0m/s)t$ $y=(4.00m/s)t-(4.90m/s^2)t^2$ (a) Write a vector expression for the ball’s position as a function of time, using the unit vectors and . By taking derivatives, obtain expressions for (b) the velocity vector as a function of time and (c) the acceleration vector as a function of time. Next use unit–vector notation to write expressions for (d) the position, (e) the velocity, and (f) the acceleration of the golf ball, all at t 3.00 s.

 2. A golf ball is hit off a tee at the edge of a cliff. Its x and y coordinates as functions of time are given by the following expressions:

$x=-(18.0m/s)t$

$y=(4.00m/s)t-(4.90m/s^2)t^2$

 (a) Write a vector expression for the ball’s position as a function of time, using the unit vectors and . By taking derivatives, obtain expressions for (b) the velocity vector as a function of time and (c) the acceleration vector as a function of time. Next use unit–vector notation to write expressions for (d) the position, (e) the velocity, and (f) the acceleration of the golf ball, all at t 3.00 s.