Sir Isaac Newton developed three laws of motion to help explain how forces make objects change direction or shape.
Newton's first law of motion explains that objects will remain at rest or in motion with the same speed and direction unless acted on by an unbalanced force. Spiro Liacos demonstrates this principle; forces that impact include friction, muscles, and gravity. Gravity and the normal force can create a homeostatic balance.
Forces examined include: buoyancy, lift, gravity, thrust, the normal force, and air resistance. Friction resists the relative motion of objects. Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces.
Liacos examines when multiple forces act simultaneously. Examples include: stationary, acceleration, and deceleration. Free-body diagrams describe the various forces affecting an object.
Credits: Shedding Light on Motion: Episode 6— Newton's First Law
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In episode six of the Shedding Light on Motion series, presenter Spiro Liacos is “thrown forward” in a head-on collision, “thrown backwards” when his tram takes off, and “thrown to the side” when his car suddenly turns a corner. But in fact none of these things actually happen! Using brilliant visuals, this episode looks at the fact that an object will remain stationary or move with a constant velocity unless a force acts on it. It also describes a number of different forces that affect our lives daily.
Length: 39 minutes
Copyright date: ©2017
Prices include public performance rights.
Not available to Home Video customers.
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