clairemyatt
contestada


A car is coasting backwards downhill at a speed of 3.0 m/s when the driver gets the engine started. After 2.5
s, the car is moving uphill at 4.5 m/s. Assuming that uphill is positive direction, what is the car's average
acceleration.

Respuesta :

quasarJose

Answer:

0.6m/s²

Explanation:

Given parameters:

Initial velocity  = 3m/s

Final velocity  = 4.5m/s

Time taken  = 2.4s

Unknown:

Average acceleration  = ?

Solution:

To solve this problem, we use the expression:

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

v is the final velocity

u is the initial velocity

t is the time taken

    Acceleration  = [tex]\frac{4.5 - 3}{2.5}[/tex]   = 0.6m/s²

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