GETTING ON WITH ENGLISH IN THE LAB 2n ESO: Study of movement

Study  of a movement  through  space-time  graph

 Objective:

 Trying to simulate a uniform rectilinear movement (URM)

Material

• A plastic graduated cylinder

• Water

• A Litlle ball made of plastilin

• A chronometer

Procedure:

Fill the graduated cylinder with water

Let intervals of 10 cm to 50 cm.

Drop the ball of plastilin and note the time it takes to get through  the point of 10 cm.

Repeat 3 times

Drop the ball of plastilin and note the time it takes to get through  the point of 20 cm.

Repeat 3 times

Calculate the average, so that  data will be more reliable

Note the data in a  space-time table

Space  x (cm)
Time  (s)

Time Average           ______                    _______               ________  

Represent the space-time graph

Questions:

1.       Does the average speed remain constant?

2.       If there are variations, offer  an  explanation that justifies them

3.       The results are close to what was expected for a uniform rectilinear movement?    Why?

4.       If we did the  experiment in air instead of water what kind of movement  did the ball have? How would the graph  space-time be? And the graphic speed time?