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Q.
Mark the correct option. If a ball is projected with velocity $ {{v}_{o}} $ at an angle of elevation 30?, then
MGIMS WardhaMGIMS Wardha 2011
Solution:
Horizontal and vertical components of velocity in projectile motion are $ {{u}_{x}}=u\cos \theta $ $ {{u}_{y}}=u\sin \theta $ So, horizontal and vertical components of momentum are $ {{p}_{x}}=mu\,\cos \theta $ $ {{p}_{y}}=mu\text{ }\sin \theta $ At the highest point of its path, the vertical component of momentum becomes zero but horizontal component remains same. So, horizontal component of momentum will be conserved.