25 and 27 please

aav = 0.62 m/s2 [24 W of N] The average acceleration is 0.62 m/s2 [24. W of N]. Practice Understanding Concepts 25. A car with a velocity of 25 m/s [E] changes its velocity to 25 m/s [S] in 15 s. Calculate the car's average acceleration. 26. A watercraft with an initial velocity of 6.4 m/s [E] undergoes an average acceler- ation of 2.0 m/s2 [S] for 2.5 s. What is the final velocity of the watercraft? 27. A hockey puck rebounds from a board as shown in Figure 16. The puck is in contact with the board for 2.5 ms. Determine the average acceleration of the puck over the interval. N | V = 26 m/s | Vel= 21 m/s > E 220 220 Figure 16 Motion of the puck 28. A passenger in a hot-air balloon throws a ball with an initial unknown velocity. The ball accelerates at 9.8 m/s2 [down] for 2.0 s, at which time its instantaneous velocity is 24 m/s [450 below the horizontal]. Determine the ball's initial velocity. 29. At 3:00 P.M. a truck travelling on a winding highway has a velocity of 82.0 km/h [38.20 E of N]; at 3:15 P.M., it has a velocity of 82.0 km/h [12.70 S of E]. Assuming that +x is east and +y is north, determine the x- and y-components of the average acceleration during this time interval