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23 Nov 2019

King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, 11 m above the moat. The rock is launced at a speed of 30 m/s and an angle of 28 degrees above the horizontal. How far from the castle wall does the launched rock hit the ground?

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Casey Durgan
Casey DurganLv2
20 Aug 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

King Arthur's knights fire a cannon from the top of the castlewall. The cannonball is fired at a speed of 52 m/s and at an angleof 34ร‚ยฐ. A second cannonball that was accidentally dropped hits themoat below in 1.0 s.

(a) How tall is the top of the castle wall?


(b) How long is the fired cannonball in the air?


(c) How far from the castle wall does the fired cannonball hit theground?


(d) What is the fired ball's maximum height above the ground?

An attacker at the base of a castle wall 3.65 m high throws a rock straight up with a speed 7.40 m/s from a height of 1.55 m above the ground. (a)Will the rock reach the top of the wall? (b)If so, what is its speed at the top? If not, what initial speed must it have to reach the top? (c)Find the change of speed of a rock thrown straight down from the top of the wall at an initial speed of 7.40 m/s and moving between the same two points. (d)Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? (e)Explain physically why it does or does not agree.

An attacker at the base of a castle wall 3.65 m high throws a rock straight up with a speed 7.40 m/s from a height of 1.55 m above the ground. (a)Will the rock reach the top of the wall? (b)If so, what is its speed at the top? If not, what initial speed must it have to reach the top? (c)Find the change of speed of a rock thrown straight down from the top of the wall at an initial speed of 7.40 m/s and moving between the same two points. (d)Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? (e)Explain physically why it does or does not agree.

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