Question

please help me asap its important...​

Answer 1

Answer: 17.1 is 8.33m/sec^2

               17.2 is -9m/sec^2

Step-by-step explanation:

17.1) Acceleration= change in velocity/change in time

                     = 25-0/3-0

                     =8.33m/sec^2

17.2) Acceleration= change in velocity/change in time

                              = 16-25/4-3

                              = -9m/sec^2

Note: In 17.2, the answer comes negative because retardation took place.