Question

A seal swims rightward 3 m, but then notices a shark behind it. The seal speeds up

rightward for 12 m and swims a total time 4 s.

3 m

12 m

What is the seal's average velocity for the swim?

Answer 1

average velocity for the swim:

3.8 m/s

average speed for the swim:

3.8 m/s

Answer 2

2.25m/s

Step-by-step explanation:

Average velocity is the change in displacement of a bod with respect to time;

Velocity = Δd/Δt

velocity = d₂-d₁/Δt

Given d₂ = 12m, d₁ = 3m and Δt = 4s

Substitute the given value into the fromula;

velocity = 12-3/4

velocity = 9/4

velocity = 2.25m/s

Hence the seal's average velocity for the swim is 2.25m/s