Question

a particle projected from ground moves at angle of 45 degree with horizontal one second after projection and speed is minimum two seconds after the projection . what is the angle of projection of particle in terms of tan ??

Answer 1

hi guy it is too simple just you need to focus on the formula

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a partcle projected from ground moves at...

a partcle projected from ground moves at angle 45 degree one second after projection and speed is minimum two seconds after projection. The angle of projection of particle is (neglect the air resistance) :

tan-1 (3)

tan-1 (2)

tan-1 (root2)

tan-1 (4)

3 years ago

Answers : (1)

Hello Student,


speed is minimum after 2 sec means speed=vcos theta
after 1 second
v'cos45=vcos theta
also
v'sin45-g*1=0
=>v'sin45=g
=>v'=gsqrt2
also
vsin theta-g*1=v'sin45=g
=>vsin theta=2g
=>tan theta=2g/v'cos45=2
hope it will help you