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KVPY2015PhysicsMotion in Two Dimensions

A parachutist with total weight 75 ~kg drops vertically onto a sandy ground with a speed of 2 ~ms ⁻¹ and comes to a halt over a distance of 0.25 ~m . The average force from the ground on her is close to.

Options

  1. A600 ~N
  2. B1200 ~N
  3. C1350 ~N
  4. D1950 ~N

Correct answer

C. 1350 ~N

Step-by-step solution

0²=2²-2 a 1 4 a =8 ~m / s ² a _ T =10+8=18 ~m / s ² f = ma =75 18=1350 ~N

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