The shape of the cross section of a canal is a trapezium. If the canal is
10 m wide at the top, 6 m wide at the bottom and the area of its cross
section is 640 m, find the depth of the canal.
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A Ball A of mass m1 travelling with a velocity u1 collides with another Ball B of mass m2 at rest. After collision the velocity of Ball A changes to v1 and velocity of Ball B changes to v2. If the momentum is conserved, which option correctly relates the momentum before and after the collision?A Ball A of mass m1 travelling with a velocity u1 collides with another Ball B of mass m2 at rest. After collision the velocity of Ball A changes to v1 and velocity of Ball B changes to v2. If the momentum is conserved, which option correctly relates the momentum before and after the collision?
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