Motion TweeningForces of Gravity In this first exercise, you will be animating a basketball. The ball will bounce across the screen. At first it will bounce high, then lower, and then lower again.
What does this have to do with Newton’s Law of Motion? In real life, gravity will cause a bouncing ball to gradually bounce less and less. Your animation will show this in action. ![]()
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Steps
![Picture](/uploads/1/3/6/6/13661277/7680962.jpg?502)
- Open Flash
- Download the file called “Sports Balls 4class” (LINK ABOVE)
- You should see a basketball on the left side of the stage.
Add Keyframe
![Picture](/uploads/1/3/6/6/13661277/8754575.jpg?496)
- If you look at the timeline, your movie is only 1 frame long. It will need to be longer to create an animation. Click on frame 30 on the timeline. Right-click and choose INSERT KEYFRAME. (If you did this right, a solid black dot appeared on the timeline under the 30).
Move object
![Picture](/uploads/1/3/6/6/13661277/8842666.jpg?496)
- While you are at frame 30, Use the black arrow (Selection tool) to drag the basketball to the right side of the stage.
Test the animation
![Picture](/uploads/1/3/6/6/13661277/2682288.jpg?495)
- Hit ENTER on your keyboard to test the animation. The ball jumps from the left to the right.
- We need to get the ball to move smoothly across the screen. To make this happen, click on any of the grey frames on the timeline and then right-click, Create Motion Tween
Check the timeline
![Picture](/uploads/1/3/6/6/13661277/3961276.jpg?491)
If you did everything right so far, you can now see a solid black arrow on the timeline between your 2 keyframes.
Find the motion path button
![Picture](/uploads/1/3/6/6/13661277/2485964.jpg?237)
- Hit ENTER to test the animation. The ball rolls straight across the screen.
Draw a motion path
![Picture](/uploads/1/3/6/6/13661277/3378752.jpg?490)
- Click on the MOTION PATH BUTTON
Stick the object to the path
![Picture](/uploads/1/3/6/6/13661277/4833504.jpg?491)
In order for the ball to follow the path, it needs to be attached to it at each of its keyframes. You have 2 keyframes (the black dots on the timeline). One at frame 1 and the other is at frame 30.
- Go to Frame 1 on the timeline. Use the Black Arrow Tool to select the ball. The center of the ball has a white dot on it. This dot is what sticks to the motion path. Pick up the ball and move it to the beginning of your motion path. (See the picture below).
On frame 30, drag the ball to the end of the motion path. (Usually dragging the white dot to the path works best)
Hit ENTER to play the animation. If you followed the steps carefully it should bounce across the screen.
Toon animations also use a technique called Stretch $ Squash, When thinks hit the ground you shink its hieght, and when its in mid air you stretch it. This can be exadurated. To do this to your ball, go to the frame where the vall first hits the ground, add a keyframe, and squash it. Add keyframes at the other low points and repeat.
NOW WHAT
Use what you have learned to make your own example of motion tweening
Hit ENTER to play the animation. If you followed the steps carefully it should bounce across the screen.
Toon animations also use a technique called Stretch $ Squash, When thinks hit the ground you shink its hieght, and when its in mid air you stretch it. This can be exadurated. To do this to your ball, go to the frame where the vall first hits the ground, add a keyframe, and squash it. Add keyframes at the other low points and repeat.
NOW WHAT
Use what you have learned to make your own example of motion tweening