Question

What was your speed to swim over and back in the pool?

50 points
0 m/s
100 m
5.5 m/s
3.6 m/s
Other:
A) 0 m/s
B) 5.5 m/s
C) 3.6 m/s
D) Other

Answer 1

The speed of the water in the river with respect to the ground is 0 m/s.

Step-by-step explanation:

To calculate the speed of the water in the river with respect to the ground, we can use the concept of relative velocity. Since the swimmer is swimming perpendicular to the water current, the speed of the swimmer with respect to the ground is equal to the vector sum of the speed of the swimmer with respect to the water and the speed of the water with respect to the ground.

The speed of the swimmer with respect to the water is given as 0.5 m/s. The speed of the water with respect to the ground can be calculated by using the Pythagorean theorem:

Speed of water with respect to ground = sqrt((Speed of swimmer with respect to ground)^2 - (Speed of swimmer with respect to water)^2)

Substituting the given values into the formula:

Speed of water with respect to ground = sqrt((0.5 m/s)^2 - (0.5 m/s)^2)

Speed of water with respect to ground = sqrt(0 m^2/s^2)

The square root of 0 is 0, so the speed of the water in the river with respect to the ground is 0 m/s.