(Will give medal) A greyhound can go from a state of resting to running at 19.44 meters per second in 1.54 seconds. What is the greyhound's average acceleration.

A.
12.62 m/s²

B.
29.94 m/s²

C.
29.94 m/s

D.
12.62 m/s

Question

(Will give medal) A greyhound can go from a state of resting to running at 19.44 meters per second in 1.54 seconds. What is the greyhound's average acceleration.


 
 A.
12.62 m/s²
 
 B.
29.94 m/s²
 
 C.
29.94 m/s
 
 D.
12.62 m/s

anonymous · Answer

Use the acceleration formulae:

$$Final velocity (v) - Initial velocity (u) / time taken$$

anonymous · Answer

i believe it is A

anonymous · Answer

A. 12.62 m/s

anonymous · Answer

You can eliminate options C and D outright since the units on acceleration are distance per time squared, ie
$$a\propto m/s^2$$
and since you know that, from rest, the velocity of an object is given by its acceleration multiplied by the time it underwent said acceleration
$$v=at$$
then
$$a=\frac{v}{t}$$