April swims 50 m north and then turns and swims 20 m back to the south . what is her velocity if it takes her 60 seconds ?

v = 0.5 m/s

Explanation:

It is given that ,

Initially april swims 50 meter north so distance travelled by her in north direction

Then she turns 20 meter south so distance travelled by her in south direction is

Time taken by her

We need to find the velocity she travelled with.

Therefore,  velocity                                          equation 1..

We know displacement is given as distance between final position and initial position.

As we know april first move 50 m north from its initial position and came back 20 m south.

So, displacement by april is given is

Putting values of displacement covered and time taken in equation 1 ,we get      

Hence this is the required solution.

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )