Question

4) A football player starts at the 40-yard line, and runs to the 25-yard line in 2 seconds.

a) What is their speed during that run?
b) What is their velocity?
I
c) If they kept running at that velocity for another 1.3 seconds, what would their
final position be?

Answer 1

(a). Their speed during that run is 10 m/s.

(b). Their velocity is 6.86 m/s

(c). The final position is at 8.91 m.

Step-by-step explanation:

Given that,

A football player starts at the 40-yard line, and runs to the 25-yard line in 2 seconds.

Suppose, the distance between 40 yard line and 25 yard line is 20 yard.

(a). We need to calculate their speed during that run

Using formula of speed

`v=(d)/(t)`

Where. d = distance

t = time

Put the value into the formula

`v=(18.288)/(2)`

`v=10\ m/s`during that run

(b). We need to calculate their velocity

Using formula of speed

`v=(\Delta d)/(\Delta t)`

Put the value into the formula

`v=(22.86-36.58)/(2)`

`v=-6.86\ m/s`

Negative sign shows the direction of motion.

(c). If they kept running at that velocity for another 1.3 seconds,

We need to calculate the final position

Using formula of position

`d=vt`

Put the value into the formula

`d=6.86*1.3`

`d=8.91\ m`

Hence, (a). Their speed during that run is 10 m/s.

(b). Their velocity is 6.86 m/s

(c). The final position is at 8.91 m.