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one second after projection, a stone moves at an angle of 45 degree with horizontal. Two second after projection it moves horizontally. What is the angle of projection?

one second after projection, a stone moves at an angle of 45 degree with horizontal. Two second after projection it moves horizontally. What is the angle of projection?

Grade:12

1 Answers

Mostafijur Rahaman
40 Points
9 years ago
.if initial velocity is u, angle @.. Then at 1s,v1cos45=ucos@ =>v1sin45=ucos@(as cos45=sin45) after another 1s, v2sin0=v1sin45-g =>0=ucos@-g =>ucos@=g also after 2s, v2sin0=usin@-2g =>usin@=2g =>usin@=2ucos@ =>tan@=2

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