Forces and Motion Mandek Richardson University of South Florida STARS Program.
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Transcript of Forces and Motion Mandek Richardson University of South Florida STARS Program.
![Page 1: Forces and Motion Mandek Richardson University of South Florida STARS Program.](https://reader036.fdocuments.us/reader036/viewer/2022070413/5697bfb81a28abf838c9f7af/html5/thumbnails/1.jpg)
Forces and Motion
Mandek Richardson University of South Florida
STARS Program
![Page 2: Forces and Motion Mandek Richardson University of South Florida STARS Program.](https://reader036.fdocuments.us/reader036/viewer/2022070413/5697bfb81a28abf838c9f7af/html5/thumbnails/2.jpg)
Vocabulary
• Friction• Gravity• Position • Speed• Velocity• Acceleration• Momentum
![Page 3: Forces and Motion Mandek Richardson University of South Florida STARS Program.](https://reader036.fdocuments.us/reader036/viewer/2022070413/5697bfb81a28abf838c9f7af/html5/thumbnails/3.jpg)
Types of Forces?
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Friction
• Friction– force that opposes motion between 2 surfaces– depends on the:• types of surfaces• force between the surfaces
![Page 5: Forces and Motion Mandek Richardson University of South Florida STARS Program.](https://reader036.fdocuments.us/reader036/viewer/2022070413/5697bfb81a28abf838c9f7af/html5/thumbnails/5.jpg)
Friction
• Friction is greater...– between rough surfaces– when there’s a greater force
between the surfaces (e.g. more weight)
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Gravity
• Gravity – force of attraction between any two
objects in the universe
– increases as...• mass increases• distance decreases
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Gravity
• Who experiences more gravity - the astronaut or the politician?
less distance
more mass
Which exerts more gravity - the Earth or the moon?
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Gravity• Weight– the force of gravity on an object
MASSalways the same
(kg)
WEIGHTdepends on gravity
(N)
W = mgW: weight (N)m: mass (kg)g: acceleration due
to gravity (m/s2)
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Gravity• Would you weigh more on Earth or
Jupiter?
greater gravity
greater weight
greater mass
Jupiter because...
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Position
• The location of an object in space and it always depends on a frame of reference
East West Above Below
What words describe position?
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Speed and Velocity
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Speed and Velocity• Speed is the distance an object travels in a
certain amount of time– Tells you how quickly or slowly something is
moving
timespeed
distance
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Speed and Velocity
• Velocity is the measure of an objects speed in a certain direction – Must know a direction something is moving to
know its velocity
5 miles/hr, east5 miles/hr, north
5 miles/hr, west
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Acceleration
• How fast an object’s velocity changes over time
• An object accelerates when it slows down or speeds up
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Newton’s First Law
• Newton’s First Law of Motion–An object at rest will remain at rest
and an object in motion will continue moving at a constant velocity unless acted upon by a net force.
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Newton’s Second Law
• Newton’s Second Law of Motion– The acceleration of an object depends on
the object’s mass and the force applied to it
F = ma
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Newton’s Third Law• Newton’s Third Law of Motion– When one object exerts a force on a
second object, the second object exerts an equal but opposite force on the first.