3. A stone is projected at a building of height h = 53.0 m, with an initial speed of 47.0 m/s directed at a angle of 6, = 62.0° above the horizontal. %3D a) Find how long it takes the stone after launching to strike the building. b) Find the horizontal distance d, traveled by the stone. c) Find speed with which the stone strikes the building.

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3. A stone is projected at a building of height h = 53.0 m, with an initial speed of 47.0 m/s directed at an
angle of 0, = 62.0° above the horizontal.
a) Find how long it takes the stone after launching to strike the building.
b) Find the horizontal distance d, traveled by the stone.
c) Find speed with which the stone strikes the building.
Transcribed Image Text:3. A stone is projected at a building of height h = 53.0 m, with an initial speed of 47.0 m/s directed at an angle of 0, = 62.0° above the horizontal. a) Find how long it takes the stone after launching to strike the building. b) Find the horizontal distance d, traveled by the stone. c) Find speed with which the stone strikes the building.
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a.)

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yf=yi+vsinθt-1/2gt2putting the values we get.53=47sin(62)t-.5×9.8×t2solving it we gett=6.90 sec

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