Questions
The equations of motion of a projectile are given by x = 36 t metre and metre. The angle of projection is
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a
sin−145
b
sin−135
c
sin−143
d
sin−134
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Correct option is A
Given thatx = 36 t and 2y=96t−9⋅8t2From the given equations, we haveVx=dxdt=36 and vy=dydt=48−9⋅8tAt t=0,Vy=48∴ V=Vx2+Vy2=60This is shown in fig. (8).From figuresinθ=VyV=4860=45or θ=sin−1 4/5Similar Questions
Assertion : When the velocity of projection of a body is made n times, its time of flight becomes n times.
Reason : Range of projectile does not depend on the initial velocity of a body.
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