force, motion and work. how do you know if an object is moving or is at rest?
TRANSCRIPT
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Force, Motion and Work
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How do you know if an object is moving or is at rest?
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You observe that object in relation to another object. This is called FRAME OF
REFERENCE.
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Frame of ReferenceFrom a sidewalk, you would see a bus
moving.Riding on a bus, you would be still unless you got up and moved on the bus.
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How does your frame of reference affect your perception of
movement when you are in a moving vehicle?
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Force
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Force is a push or a pull that acts on an
object.When have you ever pushed or pulled anything?
Was it easy or difficult?Why was it easy or difficult?
Turn and discuss with a neighbor…..
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Balance and Unbalanced Forces
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Balanced Forces•When the forces are equal, the 2 forces
cancel each other out•Balanced forces do not cause a change in
motion.•Balanced forces are equal in strength.
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Unbalanced Forces•Unbalanced forces cause a change in motion.
• The forces are unequal.•The strongest force exerted determines the
direction of the force.•The difference between the 2 forces is called
the net force.