Mechanical energy is a combination of the energy of motion or position. This type of energy describes objects that are moving or could move. A moving ball can have energy from motion. An arrow can also have the energy of motion. Both are types of mechanical energy. Can you think of some other examples? Where does the energy of motion come from? It comes from the energy created by position. This energy is stored energy. This means it is not moving yet, but it has the potential to move. How can you store energy? The arrow gains energy from the drawn bow. As the arrow is released, the bow releases its stored energy and puts the arrow into motion. Can you think of some other ways to store energy using position?

Question: "What are two objects mentioned that can have energy from motion?"

Answer: "Book and ball"

Response: no

Two women trade houses without ever having met . They 're both looking for an escape from their problems , but by running away , both come to discover a great deal about themselves . Ria Lynch is married to Danny Lynch and they have a daughter and a son . Danny begins spending less and less time at home with his wife and children . Ria believes another baby is the solution , and is shocked to find out that indeed her husband is going to be a father - but to a child from an affair he has been having . Her husband's unfaithfulness is the event that leads Ria into her decision to switch homes with a woman from the US called Marilyn who lost her teenage son to a motorcycle accident on his birthday . Marilyn is struggling to come to terms with her son's death and has become estranged from her husband . She hopes her time in Dublin will cease her grief . Ria and Marilyn discover deep , dark secrets about the other during the summer . The two become close friends but do not reveal the secrets . { { Expand section } }

Question: "What is the problem the Marilyn is trying to escape from?"

Answer: "Marilyn is struggling to come to terms with her son's death"

Response: yes

Static electricity is like a teeter-totter. What happens if a teeter-totter is balanced? Correct! It does not move. What about when its not balanced? Yes, it will now begin to move. Charges move when they are not balanced. Charges can build up by friction. Maybe you rub your feet on a wool mat or carpet. Rubber soled shoes readily gain charges. The wool carpet easily gives up charges. The two items become unbalanced. One item has a positive charge. The other has a negative charge. The difference in charge is called static electricity. Just like the teeter-totter, something is going to move. Positive charges build up on the mat. Negative charges build up on you.

Question: "How are electrical charges similar to a teeter-totter?"

Answer: "Charges move when they are not balanced, just like a teeter-totter moves when it is not balanced"

Response: yes

Flowing water causes sediment to move. Flowing water can erode both rocks and soil. You have already learned that materials can dissolve in water. With enough time, even rocks can be dissolved by water. This process happens really slowly. It may take over a million years to dissolve a rock. It doesnt matter how big the rock is. With enough time, flowing water can dissolve it. Moving water also has the ability to move small pieces of rock and soil. How can water move a rock? Doesnt it need energy? Of course, water gets its energy because it is moving. Moving water has kinetic energy. Things that have more energy can do more work. When water stops moving it will have no energy. It will no longer be able to move the rock and soil. When this happens the rock and soil will settle to the bottom of the calm water. Scientists call this process deposition.

Question: "What are some things flowing water causes?"

Answer: "Flowing water causes sediment to move. Flowing water can erode both rocks and soil"

Response:
yes