and opposites - that's the clue - just like it says.
wasn't sure what the fireworks were about. But then I looked carefully at the
rocket taking off. Then I saw the equal and opposites.
the speeds of the guys when its one on one and one on two.
"Newton's Cradle" is just a toy but it does show equal and opposites
suddenly realised that another way of thinking about equals and opposites is
action and reaction.
you do something there is always a consequence.
way to approach this experiment is systematically. Do experiments with the square
block first of all. Alter either the mass or the velocity for just one of the
blocks. Work through a number of combinations and see what happens to the velocity
after the blocks collide. The final answer is not the velocity itself but it
is related to a combination of velocities and masses.
you can move the position of the blocks before starting the experiment - so
they do bump into each other.
Don't forget the velocity can be set in either direction
- represented by plus and minus.
rule - this "Law" - is all about collisions - what happens when objects
bump into each other.
been getting confused by the effects of friction and air resistance. Once I
turned them off I began to get some idea about what was happening. Then I could
turn friction on again.
on the combination of velocity and mass. Examine that combination before and
experiment with the crashing cars does illustrate the same rule - the same "Law".
But cars have engines - which are running before the crash and so they over
come the friction by putting in force all the time.
are some comments from other pupils and teachers that may help you to investigate.