Final answer:
Mr. Palmer's acceleration is found by dividing the change in velocity by the time it takes to change, resulting in an acceleration of 1.75 m/s^2.
Step-by-step explanation:
Mr. Palmer's acceleration can be calculated using the formula acceleration = (final velocity - initial velocity) / time. The initial velocity (vi) is 0 m/s, and the final velocity (vf) is 1.4 m/s. The time (t) taken is 0.8 seconds. Therefore, acceleration (a) can be calculated as:
a = (vf - vi) / t
a = (1.4 m/s - 0 m/s) / 0.8 s
a = 1.75 m/s2
Thus, Mr. Palmer's acceleration is 1.75 m/s2.