How is initial velocity measured

I have to record the catapult in slow motion and determine its initial velocity from two consecutive images of the projectile position as it leaves the catapult. It's found by measuring the distance of the projectile and the time interval between the consecutive images but I'm still confused as to do.

So in your pictures, you must have a way of determining both distance and time. If the background had some sort of grid that let you see measure how far the object traveled in the two consecutive pictures, you would have the distance.

Calculate the uncertainty in the launch velocity also. Method 2 - Shooting the ball up and measuring the maximum height Once again point the launcher straight up. This time try to measure how high the ball travels before moving back down. To get a more unbiased measurement, let other group members measure this height. Repeat several times to get the uncertainty. Use this to calculate the initial velocity of the ball. Method 3 - Shoot the ball horizontally off the table. For this method, aim the launcher horizontally to shoot the ball on to the floor.

Use carbon paper and normal paper to mark the location on the floor where the ball lands. Acceleration is the rate of change of velocity. It is the amount that velocity changes per unit time. The change in velocity can be calculated using the equation:. The average acceleration of an object can be calculated using the equation:. What is the initial velocity? Not Helpful 26 Helpful Initial velocity is 3. Not Helpful 13 Helpful 9. How do I modify the acceleration formula to one that gives me initial velocity?

Not Helpful 11 Helpful 8. Subtract the initial velocity from the final velocity, then divide the result by the time interval. Not Helpful 21 Helpful A ball is thrown upward at an angle of 30 with the horizontal, and lands on the top edge of a building that is 20 meters away.

Not Helpful 15 Helpful 7. As soon as you stop, the final velocity is zero. Then, simply count backward to the start and divide by pieRx3.

Not Helpful 44 Helpful 8. How do I calculate the acceleration? The acceleration is how much the velocity of the car changes every second. Not Helpful 3 Helpful 5. Include your email address to get a message when this question is answered. Submit a Tip All tip submissions are carefully reviewed before being published.

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