Questions
An object of 2.0 kg mass makes an elastic collision with another object of mass M at rest and continues to move in the original direction but with one-fourth of its original speed. What is the value of M ?
detailed solution
Correct option is C
This is a case of head-on elastic collision v2 - v1 = u1 - u2 ⇒v2 -u4=u-0 .............1 Conserving momentum 2⋅0×u+M×0=2×u4+M×v2 ⇒v2=3u2M ............2 From equations 1 and 2 we get M = 1.2 kgTalk to our academic expert!
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Three particles each of mass m are located at vertices of an equilateral triangle ABC. They start moving with equal speeds each along the meridian of the triangle and collide at its center G. If after collisions A comes to rest and B returns its path along GB, then C
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