Sandra sees a new kind of breakfast pastry sitting on a high shelf. This does or does not show an energy transfer to an object?
Sandra's dad stands still while he thinks about what is on the grocery list. This does or 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. This does or does not show an energy transfer to an object?
Sandra's dad pushes the grocery cart to make it start moving. This does or does not show an energy transfer to an object?
Sandra seeing a new kind of breakfast pastry sitting on a high shelf does not show an energy transfer to an object.
Sandra's dad standing still while thinking about the grocery list also does not show an energy transfer to an object.
Sandra sliding a gallon of milk out of the way to get a colder gallon from the back of the shelf does show an energy transfer to an object.
Sandra's dad pushing the grocery cart to make it start moving also shows an energy transfer to an object.
- Sandra seeing a new kind of breakfast pastry on a high shelf does not show an energy transfer to an object. It is simply a visual perception.
- Sandra's dad standing still while thinking about the grocery list does not show an energy transfer to an object. It is an example of potential energy being stored in his body.
- Sandra sliding a gallon of milk out of the way to get a colder gallon from the back of the shelf does not show an energy transfer to an object. It is an example of her exerting force and using kinetic energy to move the milk.
- Sandra's dad pushing the grocery cart to make it start moving does show an energy transfer to an object. In this case, the energy transfer is from Sandra's dad to the grocery cart, resulting in kinetic energy as the cart starts moving.
Let's go through each scenario to determine if there is an energy transfer to an object:
1. Sandra seeing a new kind of breakfast pastry on a high shelf: This does not show an energy transfer to an object. Sandra is merely observing the pastry without interacting with it or transferring any energy to it.
2. Sandra's dad standing still while thinking about the grocery list: This does not show an energy transfer to an object. Sandra's dad is not physically interacting with any object or transferring any energy to it in this scenario.
3. Sandra sliding 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. By physically moving the gallon of milk, Sandra is applying force and transferring energy to the object (the milk) to change its position.
4. Sandra's dad pushing the grocery cart to make it start moving: This does show an energy transfer to an object. By pushing the grocery cart, Sandra's dad is applying force and transferring energy to the object (the cart) to initiate its motion.
In summary, there is an energy transfer to an object in scenarios 3 and 4 when Sandra or her dad physically interact with an object and transfer energy to it.