# In a water- tank test involving the launching of a small model boat, the model's initial horizontal velocity is 6 m/s and its horizontal acceleration varies linearly from -12 m/s2 at t=0 to -2 m/s2 at t=t1 and then remains equal to -2 m/s2 until t=1.4 ?

##### 1 Answer

I am not sure about what you need but I think it is

#### Explanation:

The boat has a variable acceleration that can be described as linear from

Graphically:

Integrating the two expressions we can get to the velocity functions:

setting at

so:

and:

setting at

so:

At

and