2. Previous Answers SerPSE9 8.P.004. W My Notes Ask Your Te 5/10 points I A 21.0

Question

2. Previous Answers SerPSE9 8.P.004. W My Notes Ask Your Te 5/10 points I A 21.0-kg cannonball is fired from a cannon with muzzle speed of 1 150 m/s at an angle of 41.0° with the horizontal. A second ball is fired with the same initial speed at an angle of 90.0°. Let y0 at the cannon. (a) Use the isolated system model to find the maximum height reached by each ball. frst ball 29041.9 hsecond ball"(674745 m (b) Use the isolated system model to find the total mechanical energy of the ball-Earth system at the maximum height for each ball. Enrst ball Esecond ball . Need Help? ReWasch

Explanation / Answer

b) The total mechanical energy at the top for each ball is the same because they each start with the same total mechanical energy and therefore they will have the same mechanical energy at the top

So total mechanical energy = K bottom = 1/2*m*v^2 = 1/2*21.0kg*1150^2 = 1.39x10^7J for each

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