n a bridge throws a stone with an initial velocity of 12 m/s at a downward angle of 45° to the horizontal, in an attempt to hit a block of wood floating in the river below. If the stone is thrown from a height of 20 m and it just reaches the water when the block is 13 m from

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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A young girl standing on a bridge throws a stone with an initial velocity of 12 m/s at a downward angle of 45° to the horizontal, in an attempt to hit a block of wood floating in the river below. If the stone is thrown from a height of 20 m and it just reaches the water when the block is 13 m from the bridge, does the stone hit the block?
4G l 0.2K/s
6:30 PM
O 7 60% a
cindy tan - A...
All changes saved
Solution:
Answer:
R= vxt
R= 17.21 m/s (1.76 s)
R= 30.29 m
R= 30.29 m
TAN, CINDY J. STEM 12-K.JOHNSON
2. A young girl standing on a bridge throws a stone with an initial velocity of 12 m/s at a
downward angle of 45° to the horizontal, in an attempt to hit a block of wood floating in
the river below. If the stone is thrown from a height of 20 m and it just reaches the water
when the block is 13 m from the bridge, does the stone hit the block?
Given:
Find:
Ma-O sunch point
Vix= vx=12 m/s
e= 45°
a. t= ?
b. R= dx= ?
dy= -20 m
Viy= 0
g= -9.8 m/s
xblock= 13 m
vix= vcose = 12 cos 45° = 8.5 m/s
AFIGURE a.1a Athrow from the hridgehit ar
viy= vsine= 0 sin 45°= 0 m/s
tomot
Transcribed Image Text:4G l 0.2K/s 6:30 PM O 7 60% a cindy tan - A... All changes saved Solution: Answer: R= vxt R= 17.21 m/s (1.76 s) R= 30.29 m R= 30.29 m TAN, CINDY J. STEM 12-K.JOHNSON 2. A young girl standing on a bridge throws a stone with an initial velocity of 12 m/s at a downward angle of 45° to the horizontal, in an attempt to hit a block of wood floating in the river below. If the stone is thrown from a height of 20 m and it just reaches the water when the block is 13 m from the bridge, does the stone hit the block? Given: Find: Ma-O sunch point Vix= vx=12 m/s e= 45° a. t= ? b. R= dx= ? dy= -20 m Viy= 0 g= -9.8 m/s xblock= 13 m vix= vcose = 12 cos 45° = 8.5 m/s AFIGURE a.1a Athrow from the hridgehit ar viy= vsine= 0 sin 45°= 0 m/s tomot
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