Question

4 pt q9: find the total speed in m/s. show your work. include all units. a swimmer moves 120 m north in 60 s. 5 pt q10: find the total velocity in m/s. show your work. include all units.

Explanation:

Step1: Recall speed formula

Speed = $\frac{distance}{time}$

Step2: Substitute values

Given distance = 120 m and time = 60 s. So, speed = $\frac{120\ m}{60\ s}$

Step3: Calculate speed

$\frac{120}{60}=2$ m/s

Step4: Recall velocity concept

Velocity is a vector quantity. For motion in a straight - line (here north - direction), magnitude of velocity for this case is the same as speed when there is no change in direction during the motion. The direction is north. So velocity = 2 m/s north

Answer:

Q9: 2 m/s
Q10: 2 m/s north