Sandra and her dad go to the grocery story. As they do their shopping, Sandra's dad asks her about her homework. Sandra remembers that she is supposed to make a list of "real world" examples of energy transfer.

Question

Which of the following could be included on a list of examples showing an energy transfer to an object?

(2 points)
This DOES show an energy transfer to an object. This does NOT show an energy transfer to an object.
Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.

Sandra's dad stands still while he thinks about what is on the grocery list.

Sandra sees a new kind of breakfast pastry sitting on a high shelf.

Sandra's dad pushes the grocery cart to make it start moving.

Answer 1

Here’s how each of the options would be categorized regarding energy transfer to an object:

1. Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.

   • This DOES show an energy transfer to an object (the gallon of milk moves due to the energy exerted by Sandra).

2. Sandra's dad stands still while he thinks about what is on the grocery list.

   • This DOES NOT show an energy transfer to an object (there is no movement or energy application to any object).

3. Sandra sees a new kind of breakfast pastry sitting on a high shelf.

   • This DOES NOT show an energy transfer to an object (observing does not involve energy transfer to any object).

4. Sandra's dad pushes the grocery cart to make it start moving.

   • This DOES show an energy transfer to an object (the cart moves due to the energy exerted by Sandra's dad).

In summary:

• Examples that show energy transfer: 1, 4
• Examples that do not show energy transfer: 2, 3