91 During volcanic erup-tions, chunks of solid rockcan be blasted out of the vol-Fig.90.cano; these projectiles arecalled volcanic bombs. Figure 4-51 shows a cross section of Mt.Fuji, in Japan. (a) At what initial speed would a bomb have to beejected, at angle O 35° to the horizontal, from the vent at A inorder to fall at the foot of the volcano at B, at vertical distance h=3.30 km and horizontal distance d 9.40 km? Ignore, for the mo-ment, the effects of air on the bomb's travel. (b) What would be thetime of flight? (c) Would the effect of the air increase or decreaseyour answer in (a)?wwwwwwFlg. 4-51 Problem 91.

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Step 1

It is given that

Horizontal and vertical trajectories can be written as

Step 2

a) The initial velocity is given as

Step 3

b) Time of flight,

...

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