A rolling ball moves from x1 = 3.2 cm to x2 = -4.4 cm during the time from t1 = 3.4 sec to t2 = 6.2 sec.
What is its average velocity?
-2.7 cm/s
To find the average velocity, we need to use the formula:
Average velocity = (change in position) / (change in time)
The change in position is given by:
Change in position = x2 - x1 = -4.4 cm - 3.2 cm = -7.6 cm
The change in time is given by:
Change in time = t2 - t1 = 6.2 sec - 3.4 sec = 2.8 sec
Now, we can substitute these values into the formula to find the average velocity:
Average velocity = (-7.6 cm) / (2.8 sec) ≈ -2.71 cm/sec
Therefore, the average velocity of the rolling ball is approximately -2.71 cm/sec.
To find the average velocity, we need to calculate the displacement of the ball and divide it by the time interval. The displacement can be found by subtracting the initial position (x1) from the final position (x2), and the time interval is given by subtracting the initial time (t1) from the final time (t2).
Displacement = x2 - x1 = (-4.4 cm) - (3.2 cm) = -7.6 cm
Time Interval = t2 - t1 = 6.2 sec - 3.4 sec = 2.8 sec
Now, divide the displacement by the time interval to find the average velocity:
Average Velocity = Displacement / Time Interval = -7.6 cm / 2.8 sec ≈ -2.71 cm/sec
Therefore, the average velocity of the rolling ball is approximately -2.71 cm/sec.