## 7th GRADE SCIENCE : Article 25 : THURSDAY 11/16/17 , Tasks to do.

* Activity 2.17   :   Reviewing and working out potential energy .            ( 11/16/17   Thursday )

2.17.a    Do the papers and word search given to you today.

Paper 1

Paper 2

Paper 3   ( Word search ).

( 10 points ).

2.17.b    Read and check the following information. After that, use the formula to
work out the potential energy at the following wordings: (use a google docs).

1)  A stone falling from a building 250m high.

2)  A child of 50kg falling after jumping up until 0.6m high.

3)  A beisball falling after being thrown from 25m high.

Potential Energy is the stored energy of an object given its position relative to a body. Gravitational potential energy is one type of potential energy and is equal to the product of the objects mass (m), the acceleration caused by gravity (g), and the objects height (h) as distance from the surface of the ground (the body). GPE = 3kg * 9.8m/s2 * 5m = 490J       (490 Joules ).

( 5 points ).

Comentarios  Ir a formulario