How fast?
Pass of the hour


Warm-up

From Tartu to Tallinn?

In fact, we have gps and Wase and the like. But still, if we're going somewhere, when would we get there?
What is speed and how is it measured?

Let us recall the theory. We plan an experiment

Read the text and remember how the speed of bodies is calculated. Answer the question.
A car moving at a constant speed

Let's build a car that moves at a constant speed

Assemble a car moving at a constant speed from the set of test equipment. Test it. Answer the question.

We plan an experiment

Plan an experiment to measure the speed of a car moving at a constant speed. Answer the question.

We measure the speed of the car

Take measurements. Enter the results into a table. Calculate the speed of your car. Answer the question.
When would we arrive?

How much time would it take?

Read the text. Do the calculations. Answer the question.
Another challenge

Driving to victory in a different way

Read the task description. Organize a competition. Analyze its results.
Summary

Body speed, speed relativity

Speed is a physical quantity that shows how far a body travels in a certain period of time

The speed of a body is always relative, since the speed of a body is always expressed relative to some other body.

Mechanical movement, medium speed

Mechanical motions can be classified into two categories: uniform rectilinear motion and variable motion. In case of uniform straight line movement, the speed of the body does not change. In variable motion, the speed or direction of the body changes.

For non-uniform motion, we can calculate the average speed by dividing the distance traveled by the time taken to move.