Day 6: Force Diagrams and Net Force
- Due Oct 16, 2024 at 11:59pm
- Points 15
- Questions 12
- Time Limit None
- Allowed Attempts Unlimited
Instructions
FQ: How do free body diagrams connect to N1L and N2L?
Video: Why are astronauts "weightless"?
1. Demo: Normal Force
Do things really push back? (Ruler bridge + bathroom scales, shifting weight)
2. Learn: Free body diagrams and Newton's Laws
Optional: Watch this video to review force diagrams.
Balanced and unbalanced forces:
More than one force can act on an object. The combination of all the forces acting on an object, including direction, is the net force.
When the forces acting on an object completely cancel out, we say the forces are balanced.
This means the net force is zero.
Newton's First Law says balanced forces lead to constant velocity. See row 2 in the table below.
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When the forces on an object do NOT cancel out, we say the forces are unbalanced.
This means the net force is NOT zero.
Newton's Second Law says unbalanced forces lead to acceleration. See row 1, 3 and 4 in the table below.
3. Concept Builder: Match that Free Body Diagram!
4. Project: Force Diagram
Answer question #8 to create a force diagram for something falling in your sport.
5: Practice!
Take this quiz to see if you understood today's work!
Optional: Are N3L forces the same as balanced forces?
Watch this video about N3L and football