Transcript Projectile Motion - Official Beryllium 2013 Blog

Projectile Motion
Reference:
The Physics Classroom
Projectile

An object subject only to the force
of gravity
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Horizontal and vertical components of
the projectile’s velocity
Hewitt
Recall Newton’s 1st law
An object in motion continues to move with the
same speed in the same direction…
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Pull of gravity
The force of gravity will accelerate the object
downward, affecting its motion vertically.
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Independence of the two components
of motion
The horizontal velocity remain constant while the
vertical velocity changes as in 1D free fall
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Symmetrical nature of projectile motion
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Concept check 1
Supposing a snowmobile is equipped with a
flare launcher that is capable of launching a
sphere vertically (relative to the
snowmobile). If the snowmobile is in motion
and launches the flare and maintains a
constant horizontal velocity after the
launch, then where will the flare land
(neglect air resistance)?
a. in front of the snowmobile
b. behind the snowmobile
c. in the snowmobile
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Concept check 2
Suppose a rescue airplane drops a relief
package while it is moving with a constant
horizontal speed at an elevated height.
Assuming that air resistance is negligible,
where will the relief package land relative to
the plane?
a. below the plane and behind it.
b. directly below the plane
c. below the plane and ahead of it
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