Respuesta :

Contact Forces:

- Applied force (hitting a baseball)

- Spring force (a spring in a mechanical pencil causing it to push out lead)

- Drag force (Hangliding)

- Frictional force (Scraping your knee)

- Normal force (putting a pencil on your desk)

Non-Contact Forces:

- Magnetic force (Magnets attracting)

- Electric force (The charge in a lightbulb)

- Gravitational force (Apples falling from a tree

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