A. ILE '1
Student
Class
Date
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PROJECTILES 1
HORIZONTAL
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PROJECI'ILES
A horizontal projectile follows the path of half of a parabola
Components of dispiacement, velocity and acceleration simplify the projectile motion
The x-component of a horizontal projectile is a constant , motion ( ax = 0 Vx = const.
The y-component of a horizontal projectile is a free fall motion ( ay = -9.81 m/ S2 )
Refer to the Horizontal PrOjectile template for all the horizontal projectile problems
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1. A baseball rolls off a 0.70 m high desk and strikes the floor 0.25
m away from the base of the desk. How fast was the ball rolling?
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2. The Royal Gorge Bridge in Colorado rises 321 m above the Arkansas
River. Suppose you kick a rock horizontally off the bridge. The
magnitude of the rock's horizontal displacement is 45.0 m. Find the
speed at which the rock was kicked.
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3. A cat chases a mouse across a 1.0 m high table. The mouse steps out
of the way, and the cat slides off the table and strikes the floor 2.2
m from the edge of the table. When the cat slid off the table, what
was its speed?
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4. A pelican flying along a horizontal path drops a fish from a height
of 5.4 m. The fish travels 8.0 m horizontally before it hits the water
below. What is the pelican's speed?
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5. A person standing at the edge of a seaside cliff kicks a stone over
the edge with a speed of 18 m/s. The cliff is 52 m above the water's
surface.
a. How long does it take for the stone to fall to water?
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b. With what speed does it strike the water?
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6. A spy in a speed boat is being chased down a river by government
officials in a faster craft. Just as the officials' boat pulls up next
to the spyJs boat, both boats reach the edge of a 5.0 m waterfall. If
the spy's speed is 15 mls and the officials' speed is 26 mIs, how far
apart will the two vessels be when they land below the waterfall?
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7. A ball is projected horizontally from the edge of a table that is
1.00 m high, and it strikes the floor at a point 1.20 m from the base
of the table.
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a. What is the initial speed of the ball?
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b. How high is the ball when its velocity vector makes a 45.0° angle
with the horizontal?
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A ball is released from the top of an incline (from point A) and takes
t1=0.50 seconds ,to reach the bottom of the incline at point B. The
distance from A to B is d=0.40 m. The bottom of the incline is
horizontal, therefore the ball will leave the table with a horizontal
speed Vi. The height of the table from the floor is Dv=1.00 m.
a) Calculate the average speed of the ball from A to B.
d.
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b) Calculate the speed of the ball at point B (or
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c) Calculate the time 't2it takes the ball to hit the floor (B to C).
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d) Calculate the horizontal displacement Ox for the ball.
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