JackHenry
contestada

A roller coaster car rapidly picks up speed as it rolls down a hill. As it starts down the hill, its speed is 4 m/s. But 3 seconds later, at the bottom of the hill, its speed is 22 m/s. What is its average acceleration?

Respuesta :

skyluke89

The acceleration is [tex]6 m/s^2[/tex]

Explanation:

The acceleration of an object is the rate of change in velocity, and it is given by the equation

[tex]a=\frac{v-u}{t}[/tex]

where

v is the final velocity

u is the initial velocity

t is the  time needed for the velocity to change from u to v

For the roller coaster in this problem, we have

u = 4 m/s

v = 22 m/s

t = 3 s

Substituting, we find

[tex]a=\frac{22-4}{3}=6 m/s^2[/tex]

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