Q no 12: 12 A platform is pulled with a constant acceleration a A particle is projected - Physics -

Question

Q no 12:

12 A platform is pulled with a constant acceleration a A particle
is projected from the platform at angle θ with the horizontal
with respect to the platform as shown in the figure The value of
tan θ such tha particle again come to the starting point on
the platform is (a=5 m/s2): use g = 10
m/s2

(A) 4 (B) 6 (C) 2 (D) 3

Anshu Agrawal · Accepted Answer

Dear student,

Let the particle be projected with velocity u making an angle θ with the platformSo horizontal distance covereds=ucosθ×tDistance covered by the platform S=1/2at2Time of flight t=2usinθgAs the particle returns to the platform, so ucosθ×t=1/2at2or t=2ucosθ/aor 2usinθg=2ucosθaor tanθ=ga

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