Final answer:
The dog's acceleration is 1 m/s². This was calculated using the formula for uniform acceleration by dividing the change in velocity by the time taken.
Step-by-step explanation:
The student's question is asking for the acceleration of a dog that starts from rest and reaches a speed of 4 m/s after 4 seconds. To find the acceleration, you can use the formula for uniform acceleration, which is a = (v - u) / t, where v is the final velocity, u is the initial velocity, and t is the time taken to reach the final velocity.
Given that the initial velocity u is 0 m/s (since the dog starts from rest), the final velocity v is 4 m/s, and the time t is 4 seconds, we can calculate the acceleration as follows:
a = (v - u) / t = (4 m/s - 0 m/s) / 4 s = 1 m/s²
Therefore, the dog's acceleration is 1 m/s².