A cheetah can go from a state of resting to running at 20 m/s in just 2 seconds. What is the cheetah’s average acceleration?
A.
0.1 m/s2
B.
10 m/s2
C.
0.1 m/s
D.
10 m/s
vf=at
a=vf/t
To find the average acceleration, you need to use the formula:
Average acceleration = (final velocity - initial velocity) / time
In this case, the final velocity is 20 m/s, the initial velocity is 0 m/s (since the cheetah is at rest), and the time is 2 seconds.
Plugging these values into the formula:
Average acceleration = (20 m/s - 0 m/s) / 2 s
Simplifying the expression:
Average acceleration = 20 m/s / 2 s
Calculating the value:
Average acceleration = 10 m/s²
Therefore, the correct answer is B. 10 m/s².