Question

A puppy is running with a speed of 11.2 m/s towards it owner when it
gets distracted by a squirrel and stops running. If it halted its run in 2 s,
what is the puppy's acceleration?

Answer 1

Answer:

-5.6m/s²

Explanation:

Given parameters:

Initial speed  = 11.2m/s

Time of running  = 2s

Unknown:

Acceleration of the puppy  = ?

Solution:

Acceleration is the rate of change of velocity with time.

So;

   Acceleration  = $\frac{Final speed - initial speed }{time}$  

final speed  = 0m/s

 Acceleration  = $\frac{0 - 11.2}{2}$    = -5.6m/s²