Question

The table below shows data of sprints of animals that traveled 75 meters. At each distance marker, the animals' times were recorded. Which animal moves with accelerated motion?

Answer 1

i think its animal 4

Step-by-step explanation:

Answer 2

Animal 1

Step-by-step explanation:

By the definition we know:

`acceleration= (change\,\,in\,\,speed)/(time\,\,taken)`

From the given data table we calculate the speed of each animal at the given distance points.

`speed=(distance)/(time)`

Animal 1:

after 25 meters:

`speed=(25)/(3)`

`speed=8.33 \,m.s^(-1)`

after 50 meters:

`speed=(50)/(5)`

`speed=10 \,m.s^(-1)`

enough to prove that there exists acceleration because of change in speed with time.

Animal 2:

after 25 meters:

`speed=(25)/(4)`

`speed=6.25 \,m.s^(-1)`

after 50 meters:

`speed=(50)/(8)`

`speed=6.25 \,m.s^(-1)`

after 75 meters:

`speed=(75)/(12)`

`speed=6.25 \,m.s^(-1)`

has constant speed, hence no acceleration.

Animal 3:

after 25 meters:

`speed=(25)/(3)`

`speed=8.33 \,m.s^(-1)`

after 50 meters:

`speed=(50)/(6)`

`speed=8.33 \,m.s^(-1)`

after 75 meters:

`speed=(75)/(9)`

`speed=8.33 \,m.s^(-1)`

has constant speed, hence no acceleration.

Animal 4:

after 25 meters:

`speed=(25)/(10)`

`speed=2.5 \,m.s^(-1)`

after 50 meters:

`speed=(50)/(20)`

`speed=2.5 \,m.s^(-1)`

after 75 meters:

`speed=(75)/(30)`

`speed=2.5 \,m.s^(-1)`

has constant speed, hence no acceleration.