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Question

body thrown up along a frictionless inclined plane of angle of inclination 30∘ covers a distance of 40 m along the plane. If the body id projected with the same speed at an angle of 30∘ with the ground, it will have a range of
(Take g=10 ms−2) please explain it clearly😣😥😥


Solution


We found a similar question to the one that you posted. Please check it out here.

Or


Let u be the initial speed with which the body is thrown along the inclined plane. As shown in the figure , the effective deceleration is given by 
a=gsinθ=gsin30=g2=5ms2

Now, from the third equation of motion,
v2=u22as
0=u22×5×40
u=20m/s
A projectile projected at angle θ=30 with this speed will have a range of
R=u2sin2θg=20×20×sin6010=203m
Hence the correct choice is (c).


Physics

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