1 / 13

Tom Sawyer Day: Raft Building

Tom Sawyer Day: Raft Building. What makes rafts work?. Remember FORCE ? A force is a push or a pull A river flows because of the force of gravity on the water (current) When a raft is placed in the water, it is “pushed” by the force of the river. What makes rafts work?.

cloris
Download Presentation

Tom Sawyer Day: Raft Building

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Tom Sawyer Day:Raft Building

  2. What makes rafts work? • Remember FORCE? • A force is a push or a pull • A river flows because of the force of gravity on the water (current) • When a raft is placed in the water, it is “pushed” by the force of the river

  3. What makes rafts work? • Keep FRICTION in mind • Friction is a force that resists motion between two objects in contact (fluid friction) • Think about what you can do to minimize friction between your raft and the water

  4. What makes rafts work? • One last thing to think about…WIND is a force, too • Sails or other structures might help your raft harness this extra force source and move faster!

  5. Fan line

  6. Previous Winner

  7. Raft Building Supplies • 5 Styrofoam cups • 2 pencils or dowels • 2 bamboo skewers • 3 sheets of construction paper • Masking tape • Glue sticks

  8. Raft Building Supplies • Get all supplies at once • Do not have to use all supplies • May break or alter supplies • None will be replaced • None can be brought from home • Planning is essential

More Related