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Gravitation question

2019 · 12 Jan · Shift 1 · Q51
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  5. /2019 · 12 Jan · Shift 1 · Q51

Gravitation question

2019 · 12 Jan · Shift 1 · Q51

JEE MainPhysicsGravitationMCQ+4 / −1
A straight rod of length L extends from x = a to x = L + a. The gravitational force it exerts on a point mass 'm' at x = 0, if the mass per unit length of the rod is A + Bx2 , is given by :
  1. A
    Gm[A(1a−1a+L)−BL]Gm\left[ {A\left( {{1 \over a} - {1 \over {a + L}}} \right) - BL} \right]Gm[A(a1​−a+L1​)−BL]
  2. B
    Gm[A(1a−1a+L)+BL]Gm\left[ {A\left( {{1 \over a} - {1 \over {a + L}}} \right) + BL} \right]Gm[A(a1​−a+L1​)+BL]
  3. C
    Gm[A(1a+L−1a)+BL]Gm\left[ {A\left( {{1 \over {a + L}} - {1 \over a}} \right) + BL} \right]Gm[A(a+L1​−a1​)+BL]
  4. D
    Gm[A(1a+L−1a)−BL]Gm\left[ {A\left( {{1 \over {a + L}} - {1 \over a}} \right) - BL} \right]Gm[A(a+L1​−a1​)−BL]
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