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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A particle is projected with a certain velocity at an angle alpha above the horizontal from the foot of an inclined plane of inclination 30. If the particle strikes the plane normally, then alpha is equal to

A particle is projected with a certain velocity at an angle alpha above the horizontal from the foot of an inclined plane of inclination 30. If the particle strikes the plane normally, then alpha is equal to

A particle is projected with a certain velocity at an angle alpha above the horizontal from the foot of an inclined plane of inclination 30. If the particle strikes the plane normally then alpha is equal to