Question

An object starts from rest and exhibits the motion represented by the graph. The object’s average velocity during the 3 second to 5 second time interval is approximately –
8.4 m/s


3.2 m/s


4.8 m/s


.0125 m/s

Answer 1

Answer:

8.4 m/s

Explanation:

Initial velocity of the object is 0 as it was at rest.

We need to find the object’s average velocity during the 3 second to 5 second.

We can see from the graph that from 3 s to 5 s, the graph is a straight line. If we take the slope we can find the average velocity during the 3 second to 5 second.

Displacement between 3 s to 5 s is :

D = 24.8 m - 8 m = 16.8 m

Time = 5 s - 3 s = 2 s

Now,

Average velocity,

$v=\dfrac{\Delta y}{\Delta x}\\\\y=\dfrac{16.8\ m}{2\ m}\\\\y=8.4\ m$

So, the object’s average velocity during the 3 second to 5 second is 8.4 m/s.