Question

Its takes a person 42 seconds to swim in a straight line from the west end of a pool to the east end of the pool, a distance of 45 meters. What is the swimmer’s velocity?A. 0.9 m/s westB. 1.1 m/s westC. 1.1 m/s eastD. 0.9 m/s east

Answer 1

C. 1.1 m/s east

Step-by-step explanation

Step 1

Diagram

Step 2

Velocity is defined as a vector measurement of the rate and direction of motion.

we can find the manginutde of the velocity using the formula:

`velocity=\text{ }(distance)/(time)`

so

a)let

`\begin{gathered} distance=\text{ 45 meteres} \\ time=42\text{ sec} \end{gathered}`

b) now, replace in the formula

`\begin{gathered} velocity=\text{ }(distance)/(time) \\ velocity=\frac{45\text{ m}}{42\text{ s}}=1.07(m)/(s)\approx1.1(m)/(s) \end{gathered}`

so, the magnitude is 1.1

c) finally, The direction of a vector can be described as beingeast or west or north or south,therefore, as the person goes from west to east the answer is

C. 1.1 m/s east

I hope this helps you