Two identical billiard balls strike a rigid wall with the same speed, and are re

Question

Two identical billiard balls strike a rigid wall with the same speed, and are reflected without any change of speed. The first ball strikes perpendicular to the wall. The second ball strikes the wall at an angle of 30º from the perpendicular, and bounces off at an angle of 30º from perpendicular to the wall. Determine the direction of the force on the wall due to each ball. Choose correct answers: Perpendicular to the wall Parallel to the wall At 30 degrees relative to the wall At 60 degrees relative to the wall

A) Perpendicular to the wall

B) Parallel to the wall

C)At 30 degrees relative to the wall

D) At 60 degrees relative to the wall

Explanation / Answer

the direction of the force exert by 1st ball is perpendicular to the wall

the direction of the force exert by 2nd ball is 60 degree relative to the wall.

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