Question

A dog starts running at 10 m/s and then speeds up to 40 m/s over 20 seconds. What is the dog's acceleration?

a) 3 m/s²
b) 1.5 m/s²
c) 2 m/s²
d) 2.5 m/s²

Answer 1

The dog's acceleration is 1.5 m/s².

Step-by-step explanation:

To find the acceleration of the dog, we can use the formula:

acceleration = (final velocity - initial velocity) / time

Using the given information:

Initial velocity = 10 m/s

Final velocity = 40 m/s

Time = 20 seconds

Substituting these values into the formula:

acceleration = (40 m/s - 10 m/s) / 20 s = 1.5 m/s²

Therefore, the dog's acceleration is 1.5 m/s², so the correct answer is option b).