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Thank you.

Mr B

Monday, May 30, 2011

Which will hit the ground first?

Aim:
To find out which item will hit the ground first

Materials:
Brick, soccer ball, cricket ball, tennis ball, fort, 3 stop watches, 4 people

Steps
1. Take all items to the top of the fort except the stop watches.
2. Have 3 people stand at bottom with a watch each (clear from the fort)
3. Count down from 5 and drop each item from the fort, timing the time it takes to drop.
4. Record the results

Results
Item                Time 1             Time 2              Time 3             Average

Tennis Ball        62                     69                  59                     63.3

Cricket Ball      79                     63                   62                      68

Soccer Ball       69                    50                   56                     58.3

Brick               1.0                    1.0                   X                      1.0

Brick                56                     X                    X                      56

Brick                57                    78                   84                    72.6

Brick               56                   2.68                   X                       56

Keys                 75                  1.06                 93                     91.3

Keys                78                     X                     X                     78

Keys                66                    62                   69                       65.6

Keys                56                  1.37                  54                        55



Publish your reasons for the data we see above and a conclusion to the experiment.

What was the outcome?

Was this a fair test?                       

Can you suggest ways of making this test more reliable?
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8 comments:

  1. Anonymous10:29 AM, May 31, 2011

    THe keys won because they are made of metal. - Greta

    ReplyDelete
  2. Anonymous10:31 AM, May 31, 2011

    Keys are the fastest because of brick because the keys are the fastest and teh brick slowest - MArion

    ReplyDelete
  3. Anonymous11:32 AM, May 31, 2011

    the keys hit the ground first becase they were the smallist so the air can not hit them so much so it makes them farster to get on to the ground.lydia

    ReplyDelete
  4. Anonymous11:32 AM, May 31, 2011

    --___-_-------

    ReplyDelete
  5. Anonymous11:58 AM, May 31, 2011

    The keys won because there is no room for the air to get in and they are smaller so there is less air pressure.-Jessica

    ReplyDelete
  6. Anonymous12:01 PM, May 31, 2011

    I think the keys wone because they are smaller and it is not a flat surface underneath so air dosn't catch underneath.-Libby

    ReplyDelete
  7. Anonymous12:49 PM, May 31, 2011

    the keys won because no air could get into the keys and the keys are smaller the brick was to big- steffan

    ReplyDelete
  8. Anonymous12:59 PM, May 31, 2011

    the keys won but the brick came close second by one milli second but I think we had a bit of wrong data.-Loganm

    ReplyDelete

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