An object is moving forward along a straight line. The distance the object travels (in meters) from its starting position t seconds after it started moving is given by �(�) = 3√�. Determine the average velocity of the object over the interval from t=1 to t=4.

Respuesta :

The average velocity of the object over the given interval (from t=1 to t=4) is 1 m/s

Given that; S(t) = 3√t

Also, the interval is from t = 1 to t = 4

meaning t₁ = 1 and t₂ = 4

we know that;

Average Velocity = [ Displacement / time ] = [tex]\frac{ S(t_2) - S(t_1) }{ t_2 - t_1 }[/tex]

since its given that, S(t) = 3√t

So, Average Velocity = [tex]\frac{ (3\sqrt{t_2}) - (3\sqrt{t_1)} }{{t_2} - t_1}[/tex]

we substitute in the value of t₁ and t₂

[tex]Average Velocity = \frac{ (3\sqrt{4}) - (3\sqrt{1)} }{{4} -1}[/tex]

[tex]Average Velocity = \frac{ 3(2) - 3({1)} }{{4} -1}[/tex]

[tex]Average Velocity = \frac{ 6 - 3}{3}[/tex]

[tex]Average Velocity = \frac{ 3}{3}[/tex]

Average Velocity = 1 m/s  

Therefore, the average velocity of the object over the interval from t=1 to t=4 is 1 m/s

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