For today's class, we started the class by discussing the table found on page 36 and answering the questions related to Newton's second law of motion on pages 37 and 38. We later on discussed some types of forces (page 9) and free-body diagrams (pages 13-16).
Page 36: The table shows observations, predictions, assumptions, and diagrams of Galileo's Thought Experiment on Motion. The overall experiment states that an object will remain at rest or in uniform motion unless acted on by an external force.
Types of Forces:
a. Friction- contact force that acts to oppose sliding motion between surfaces.
b. Normal- contact force exerted by a surface on an object.
c. Spring- restoring force; the push or pull a spring exerts on an object.
d. Tension- pull exerted by a string, rope, or cable when attached to a body and pulled taut.
e. Thrust- forces that move objects such as rockets, planes, cars, and people.
f. Weight- long-ranged force due to gravitational attraction between 2 objects, generally earth and an object
Free- Body Diagrams:
What is a free-body diagram? A free- body diagram is a diagram that represents an object and all the forces acting on it. To learn how to draw free-body diagrams check pages 13 to 16. These pages provide strategies on how draw a free- body diagrams and some situations in which free- body diagrams can be drawn.
Ms. K then told us to answer pages 27 and 40. We later on checked our answers and then Ms. K assigned us to do pages 41 and 42 for homework. She also gave back our kinematics test.
*for pages 41 and 42- do not do the drawings with an inclined plane
*Also remember since it's staff meeting day, there will be no afternoon classes.
Next Scribe for Wednesday's class: Dwightlord
1 comment:
Great job. Thanks for doing it for today. You covered all the points very well.
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