Question

. A sphere of mass 10kgmoving at 4 m/s make a head on elastic collision with a sphere of mass 5kg moving at 6 m/s in the opposite direction calculate their velocities after collision. (3)

Answer 1

Answer:

m1u1 + m2u2 = m1v1 + m2v2

10(4) + 5 (-6) = 10v1 + 5v2

40 - 30 = 10v1 + 5v2

10 = 10v1 + 5v2

2v1 + v2 = 2

v2 - v1  / u2 - u1 = 1

v2 - v1 / 4-(-6) = 1

v2 - v1 = 10

2v1 + v2 = 10

-        -       -

-3v1        = 8

v1 = -8/3

v2 = 2 - 2v1 = 2 + 16/3 = 22/3