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Assertion (A): A design sink rate of three metres per second is far more demanding than one of two.

Reason (R): The energy the undercarriage must absorb goes as the square of the sink rate.

Select the correct answer from the options below.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both are true and the second explains the first. Raising the sink rate from two to three metres per second more than doubles the energy, and the gear, its attachments and the surrounding structure all grow accordingly.

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