Calculating a Prince's Message: Flight Time, Moat Width and Impact Velocity

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SUMMARY

The discussion focuses on calculating the time of flight, width of the moat, and impact velocity of a rock thrown by a prince from a castle wall. The initial velocity is given as 12 m/s at an angle of 42 degrees above the horizontal, and the rock lands 9.5 meters below the initial level. Key equations for solving the problem include kinematic equations: v = u + a*t, s = ut + 0.5*a*t², and v² = u² + 2as. Participants emphasized the need to break down the initial velocity into its horizontal and vertical components to solve the problem effectively.

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Homework Statement



A prince trapped in a castle wraps a message around a rock and throws it from the top wall with an initial velocity of 12 m/s [42 deg above the horizontal] the rock lands just on the far side of the castles moat at a level 9.5m below the initial level. determine the rocks:
a) time of flight
b) width of moat
c) velocity of impact



Homework Equations



i don't know I've lost my formula sheet (but theyre basic ones) if i can just have my memory refreshed on what the equations are i can probably do it plus be able to continue on the rest of the unit exam review. my exam is next week and this question isn't for marks but for studying and i need help please



The Attempt at a Solution



dont know where to start
 
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v = u + a*t
s = ut + 0.5*a*t^2
v^2 = u^2 + 2as

v - final velocity
u - initial velocity
s - distance traversed

use the two components of the initial velocity and proceed
 

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