How do i calculate acceleration? pls help! thanks :)

As I drive down South Hill toward downtown Spokane, my car goes from a velocity of 25 mph north to a velocity of 35 miles an hour north in 5 minutes. What is my acceleration during this time?

5 mph / minute

2 mph / min squared

10 mph

Respuesta :

The acceleration is 2 mph/min

Explanation:

The acceleration of an object is the rate of change of velocity. It is defined as follows:

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

where

v is the final velocity

u is the initial velocity

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

For the car in this problem, we have (taking North as positive direction):

u = 25 mph

v = 35 mph

t = 5 min

Substituting into the equation, we find the acceleration:

[tex]a=\frac{35 mph-25mph}{5min}=2 mph/min[/tex]

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