Question

4.Jessica Diggins a US world champion cross country skier is participating in the winter Olympic games. Over a 200m stretch in her race she increases her speed with a constant acceleration from 5.1 m/s to 6.2 m/s over a period of 25 seconds. What is her acceleration

Answer 1

`a=0.044\ m/s^2`

Step-by-step explanation:

Given that,

Initial speed, u = 5.1 m/s

Final speed, v = 6.2 m/s

Time, t = 25 s

We need to find acceleration. We know that,

acceleration = rate of change of velocity

`a=(v-u)/(t)\\\\a=(6.2-5.1)/(25)\\\\a=0.044\ m/s^2`

So, her acceleration is
`0.044\ m/s^2`.