Question

An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting position in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first half of the swim, (b) the second half of the swim, and (c) the round trip. (Assume that time t2 is from the other end of the pool to the starting point. Use any variable or symbol stated above as necessary. Indicate the direction with the sign of your answer.)

Answer 1

Answer:

a)Average velocity = L/t1

b)Average velocity = - L/t2

c)Average velocity = 0

Explanation:

Given that

Length of pool = L

We know that

Average velocity = Total displacement/Total time

Average speed = Total distance/Total time

a)

Average velocity = Total displacement/Total time

Average velocity = L/t1

b)

Average velocity = Total displacement/Total time

The second half of swims it will move in negative x-direction

Average velocity = - L/t2

c)

In round trip ,the total displacement = 0

So

Average velocity = Total displacement/Total time

Average velocity = 0/Total time

Average velocity = 0