What are Balanced forces? When is an object said to be at Equilibrium?
Net force=0,
Objects may either be
1.) At rest,
2.) Having constant velocity
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15
What is Inertia?
Inertia is a property of matter, by which a mass resists changes to it's motion
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Which cart has the greatest inertia? Why?
1. a 1-kg cart traveling at 4 m/s,
2. a 2-kg cart traveling at 3 m/s,
3. a 3-kg cart traveling at 2 m/s, or,
4. a 4-kg cart traveling at 1 m/s
Cart 4
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15
What is friction?,
1) It is a contact force between 2 surfaces .
2) It resists motion
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Why does a child "fall back" when you yank the wagon forward?
1)When the wagon child's lower body starts moving as his leg is in contact with the wagon.
2) The child's upper body is still at rest, so it falls back.
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15
What is Mass vs. Weight?Also mention their SI Units.
Mass: The amount of matter something is made of. SI Units: kg,
Weight: The force of gravity acting on an object's mass.
Unit= Newton
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15
Why Shouldn't you stand in a bus while its moving?
1) When-the bus breaks, your lower body stops motions while your upper body is still in the state of motion,so you can fall.
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thief
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shark
Other team loses 20 points!
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Other team loses 15 points!
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15
What does inertia NOT dependent upon?
SPEED
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What does Inertia depend upon?
Only on MASS
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What is Newton's 1st Law of Motion?
Objects at rest remain at rest, objects in motion remain in motion unless acted upon by an unbalanced force.