# 7th GRADE SCIENCE : Article 26 : Problems 1 about Potential and kinetic energies. THANKSGIVING MEAL ENERGY SAVING.

* Activity 2.19   :   Working out potencial energy.                           ( 11/20/17   Monday )

2.19.a        Potencial energys problems.

To calculate Potential energy you only have to multiply gravity, mass
and hight.   Gravitys acceleration you know is 9.8m/s2 , mass must
come in kilograms and hight in meters.

GPE = m.g.h

Now watch these problems and try to do the following doing
the same :

PROBLEMS TO SOLVE.

-  The following are a few more problems to do :

Problem 1 :     LINK FOR PROBLEM 1.

Problem 2 :    LINK FOR PROBLEM 2.

Problem 3 :     LINK FOR PROBLEM 3.

( 10 points ).

* Activity 2.20   :   Several potential energy cases.                     ( 11/21/17   Tuesday )

2.20.a        Potencial energy situations.

Check the PAPER and work out the potential energy in each state
of the movement.

( 10 points ).

2.20.b        Check the ways a family has in order to save energy when preparing
the Thanksgiving meal. Do a report in a google docs indicating the
3 most important measures you consider to save energy :

ENERGY 1                  ENERGY 2

( 5  points ).