Physics-
General
Easy

Question

A body of mass square root of 3 kg is suspended by a string from a rigid support. The body is pulled horizontally by a force F until the string makes an angle of 30degree with the vertical. The value o F and tension in the string are

  1. 19.6 N; 19.6 N  
  2. 9.8 N; 9.8 N  
  3. 9.8 N, 19.6 N  
  4. 19.6 N, 9.8 N  

The correct answer is: 19.6 N, 9.8 N


    T c o s 30 degree equals m g
    or T equals fraction numerator m g over denominator c o s 30 degree end fraction equals fraction numerator square root of 3 cross times 9.8 over denominator square root of 3 divided by 2 end fraction equals 19.6N
    F equals T s i n 30 degree equals 19.6 cross times fraction numerator 1 over denominator 2 end fraction equals 9.8N

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