A man throws a coin off the edge of a cliff. The coin's initial velocity is 25.0 m/s directed at 40.0° with the face of the cliff, as shown in the figure. The coin hits the ground 3.75 s after being thrown and feels no appreciable air resistance as it falls. 25.0 m/s Cliff

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What is the velocity of the coin just before it hits the ground
A man throws a coin off the edge of a cliff. The coin's initial velocity is 25.0 m/s directed at 40.0°
with the face of the cliff, as shown in the figure. The coin hits the ground 3.75 s after being thrown
and feels no appreciable air resistance as it falls.
25.0 m/s
Cliff
Ground
40.0
Transcribed Image Text:A man throws a coin off the edge of a cliff. The coin's initial velocity is 25.0 m/s directed at 40.0° with the face of the cliff, as shown in the figure. The coin hits the ground 3.75 s after being thrown and feels no appreciable air resistance as it falls. 25.0 m/s Cliff Ground 40.0
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Given that,A man throws a coin the edge of a cliffInitial velocity of coin is 25.0 m/sDirected at 40.0°Coin hits the ground 3.75s after being thrownWe will resolve the velocity,Uy= 25 cos 40 = 19.15m/s (upward)  Ux = 25 sin 40 = 16.07m/s ( horizontal )whereas, h=Uyt+12gt2=19.15m/s×3.75s+12×9.8ms-2×3.75s2=140.71 mHorizontal range, Uxt=16.07m/s×3.75=60.3 m 

 

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