High School

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A student investigates the motion of a ball. They throw the ball downwards with a velocity of 1.5ms-1. If the ball accelerates at 9.8ms-2 and hits the ground 2.61s later, what was the final velocity of the ball?

Answer :

The final velocity of the ball, given that it was thrown downwards with a velocity of 1.5 m/s is 27.078 m/s

How do I determine the final velocity?

First, we shall list out the various parameters given from the question. This is given below:

  • Initial velocity (u) = 1.5 m/s
  • Acceleration (a) = 9.8 m/s²
  • Time (t) = 2.61 seconds
  • Final velocity (v) =?

The final velocity of the ball can be obtained by using the following equation of motion:

v = u + at

Inputting the values, we have:

v = 1.5 + (9.8 × 2.61)

Clear bracket

v = 1.5 + 25.578

v = 27.078 m/s

Thus, from above calculation, it is evident that the final velocity of the ball is 27.078 m/s

Learn more about velocity:

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