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Vectors and Scalars. Projectile Motion. Relative Motion. Vector Operations. Random. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500. - PowerPoint PPT Presentation
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Vectors and Scalars
Projectile Motion
Relative Motion
VectorOperations
Random
What is a physical quantity that has both direction and
magnitude?
A vector
What is a quantity that can be completely specified by its
magnitude but with no direction?
A scalar
What is the answer found by adding two vectors?
The Resultant
What is the result of multiplying or dividing vectors?
Vectors
A car moves north 30 miles then puts it in reverse for 15 miles. What is its displacement from
start to finish?
15 miles North
What is and object that is launched or thrown into the air
that is subject to gravity?
A projectile
What is the path of a projectile?
A parabola
What slows down a projectile while in flight?
Air resistance
Once a projectile is fired horizontally, neglecting
resistance, what is its acceleration?
0 m/s²
The royal Gorge Bridge in Colorado rises 320m above the Arkansas river. Suppose you
kick a little rock horizontally off the bridge. The rock hits the
water such that the magnitude of its horizontal displacement is
50m. Find the speed at which the rock was kicked.
6.2 m/s
What do velocity measurements depend on?
The frame of reference of the observer
When a projectile is fired at and angle, what will its velocity be
when it hits the ground?
The same as its initial velocity, but negative
What is the range of a projectile?
The horizontal distance it covers
What is the amount of time a projectile is in flight called?
Hang time
A boat heading north crosses a wide river with a velocity of 20 km/h relative to the water. The
river has a uniform velocity of 10 km/h due east. Determine the
boat’s velocity with respect to an observer on shore.
22.36 km/h @ 46 degrees east
What is the Pythagorean theorem?
A² + B² = C²
What is the Sin equation?
Opposite side over hypotenuse
What is the Cos equation?
Adjacent side over hypotenuse
What is the Tan equation?
Opposite side over adjacent
A man moves 80 m horizontally, then travels 40 m at an angle of
30 degrees above the horizontal. What is its displacement from the
starting point?
116.37 m
What angle gives the greatest hang time?
90 degrees
What angle gives the greatest range?
45 degrees
What angle gives the greatest height?
90 degrees
How would an increase in mass effect the range of a projectile?
It wouldn’t
How would an increase in velocity effect the range?
It would increase the range
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