Question

Please help!! The graph in the figure shows the position of a particle as it travels along the x-axis. What is the magnitude of the average speed of the particle between t = 1.0 s and t = 4.0 s?

Answer 1

The uniform movement allows to find the average speed, for which the correct answer is:

        B) 1.3 m / s

Kinematics studies the movement of bodies, establishing relationships between position, velocity and acceleration. In the special case that the acceleration is zero the motion is called uniform motion.

        v = $\frac{\Delta x}{\Delta t}$

Where v is the velocity, Δx is the position variation and Δt is the time variation in the analyzed interval.

In this case

         v = $\frac{2.0 - (-2.0)}{4.0\ -1.0}$

          v = 1.33 m / s

In conclusion using the uniform motion ratios we can find that the correct answer for the average velocity is

        B) 1.3 m / s

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