A each of explosive is built tha has a fracture mass s in the hat This cannonbal

Question

A each of explosive is built tha has a fracture mass s in the hat This cannonball are er Wh the explosive stri center, pushed in en horizontal is fired opposite directions. the two cannonbanhaans di from a can with initial velocity non When the triggered. Immediately cannonball ofv (10- (10 withi the before starts after the reaches the Ai explosive to fall vertically left highest pointin tr explosive is its itself was massless. down. ignore air nce for all questions, and assume that the at of the cannonbal instant isi Question 7: What is the velocity of the right front) hat ot the cannonbal? -a) 20m 104 -10 c) It is at rest. d) 10 e) -10 j Question 8: When both cannonball halves strike the ground, how from the initiallaunch position istheir center of mass? (a) 25 m b) 20 m c) 15 m d) 30 m e) 30 m cannonbalstrike the ground? Question 9: How far from the launch point does the front half of the a) 30 m b) 20 m c) 35 m d) 25 m e) 40 m

Explanation / Answer

conserving momentum

At highest point ,velocity =10i (vertical velocity will be zero)

by conservation of momentum (right part has velocity v (first part had v=0 )

m*v/2=mv

v=20 m/s

8

left part landed at x=Range/2=(u^2sin(2*45)/g)/2=10.204 m

right part will land at =20*1.02(time taken to come to ground)+10.204=30.612 m

centre of mass=20.408 m

9 left part strike the ground at 30.612m (calculated in (b) part)

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