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Asked in PMC Practice Test 25 (2021) 2021Moderate

A string 2m long is used to whirl a 200g stone in a horizontal circle at a speed of 2m/s. Find the tension in the string.

Correct answer: A. 0.4 N

  • A. 0.4 N
  • B. 1.4 N
  • C. 2.4 N
  • D. 3.4 N

Explanation

Tension or force in the string, F=(mv2)/r Where m=200g=0.2kgv=2 m/s and r= 2mAdd in the values F=(2x22)/2= "0.4N"

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