Question

During the final stretch of the race Mina runs at 2.75 m/s as she approaches the other runner ahead of her. Mina accelerates at 1.22m/s² for 3.00s in order to run past the other runner how fast is Mina running at the end of her acceleration

A. 6.41 m/s
B. 4.47m/s
C. 3.66 m/s
D. 4.92m/s

Answer 1

To find Mina's final velocity after acceleration, use the kinematics equation v = u + at. Plugging in the given values, her final velocity is found to be 6.41 m/s, so the correct answer is A. 6.41 m/s.

Step-by-step explanation:

To determine Mina's final velocity after her acceleration, we'll use the basic kinematics equation for constant acceleration:

v = u + at

Where:

v = final velocity (what we're trying to find)

u = initial velocity (2.75 m/s as stated)

a = acceleration (1.22 m/s² as stated)

t = time (3.00 s as stated)

Plugging in Mina's values, we get:

v = 2.75 m/s + (1.22 m/s² × 3.00 s)

v = 2.75 m/s + 3.66 m/s

v = 6.41 m/s

Therefore, Mina is running at 6.41 m/s at the end of her acceleration. The correct answer is A. 6.41 m/s.