a sprinter accelerates from rest to 10 m/s in 1.3s. What is her acceleration
a) in m/s^2>
b) km/n^2?
To calculate the acceleration, we can use the formula:
acceleration (a) = change in velocity (Δv) / time (t)
Given that the sprinter accelerates from rest (initial velocity, u = 0) to 10 m/s (final velocity, v = 10 m/s) in 1.3 seconds (t = 1.3 s), we can substitute these values into the formula to find the acceleration:
a = (v - u) / t
a = (10 m/s - 0 m/s) / 1.3 s
a = 10 m/s / 1.3 s
Now let's calculate this:
a ≈ 7.69 m/s²
So, the acceleration of the sprinter is approximately 7.69 m/s².
Since the options given are in m/s² and km/n², we can conclude that the correct answer is option a) in m/s².