Free Fall

The following video 'Free Fall' should be of interest to people who studies Science, particularly Physics.

The video was taken with a PSP and Go!Cam at 30 fs. (Anything, say a mobile phone, with video capturing facility will do.)

It shows a student dropping an object against a board marked at 5 cm intervals. It was tak...en in the Physics Lab of Benghazi Europen School, Benghazi, Libya by me when I used to teach there.

If you watch this with Windows Media Player with Play Speed Settings activated, you can advance it frame by frame. Each frame is 1/30 s apart.

Watch the position of the ball as it just starts to fall. Advance one frame. Watch its position.

The object, a small ball, becomes longer elongated blur as frames advanced because the ball is moving faster and faster (accelerated due to gravity).

Read the position of the top of the blur against frame number. If zero is the time of 1st frame, 1/30 is the time for second frame and so on.

If you scatter plot the position of the top of each blur against time, you should see a parabola as expected. If you fit it with quadratic regression, you should be able to get 'g'.

Category:

Education

Tags:

• Physics
• Mechanics
• Free Fall
• Gravity
• PSP
• Go!Cam

[nightmaraz]

@Omarbugaighis omg who is he???? hes soooo hawtt! love cos :)

[Omarbugaighis]

who is this strikingly goodlooking fellow?