Question

Usain Bolt went from a velocity of 11.0 m/s at 7 seconds into his run up to a velocity of 13.0 m/s at 9 seconds into his run. What was his acceleration?

A) 0.5 m/s²
B) 1.0 m/s²
C) 1.5 m/s²
D) 2.0 m/s²

Answer 1

Usain Bolt's acceleration during the sprint was 1.0 m/s², calculated using the change in velocity over the time interval.

Step-by-step explanation:

To find Usain Bolt's acceleration during a sprint where his velocity increases from 11.0 m/s to 13.0 m/s over a 2-second time interval, we can use the formula for acceleration, which is:

acceleration = (final velocity - initial velocity) / time taken

Plugging in the given values:

acceleration = (13.0 m/s - 11.0 m/s) / (9 s - 7 s)
acceleration = 2.0 m/s / 2 s
acceleration = 1.0 m/s²

Therefore, his acceleration is 1.0 m/s², which corresponds to option B.