Home
Class 11
PHYSICS
A body of mass mis suspended by two str...

A body of mass mis suspended by two strings making angles `alpha and beta` with the horizontal. Find the tensions in the strings.

Text Solution

Verified by Experts

Take the body of mass m as the system. The fores acting on the system are
i. mg downwards (by the earth),
ii. `T_1` along the first string (by the first string ) and
`iii. T_2 along the second string (by the second string)


These forces are shown in ure. As the body is i equilibrium, these forces must add to zero. Taking horozontal components,
`T_1 cos alpha - T_2 cos beta +mg cos pi/2 =0`
`T_1 cos alpha= T_2 cos beta` .........i
Taking vertical components,
`T_1siN/Alpha+T_2sinbeta-mg=0` .............ii
ElimiN/Ating `T_2 from i and ii, `
`T_1 sin alpha + T_1(cos alpha)/(cos beta) isn beta =mg`
or , ` T_1 = mg/(sin alpha + (cos alpha)/(cos beta)sin beta=(mg cos beta)/(sin(alpha+beta))`
From i. `T_2 = (mgcosalpha)/(sin (alpha+beta)`
Promotional Banner

Topper's Solved these Questions

  • NEWTON'S LAWS OF MOTION

    HC VERMA|Exercise Short Answer|17 Videos
  • NEWTON'S LAWS OF MOTION

    HC VERMA|Exercise Objective 1|14 Videos
  • NEWTON'S LAWS OF MOTION

    HC VERMA|Exercise Exercises|42 Videos
  • LAWS OF THERMODYNAMICS

    HC VERMA|Exercise Short Answer|15 Videos
  • PHYSICS AND MATHEMATICS

    HC VERMA|Exercise Exercises|34 Videos

Similar Questions

Explore conceptually related problems

A block of mass M si suspended by two strings angles theta_(1) and theta_(2) with the horizontal. Find the tensions in the strings.

A block of mass 10 kg is suspended with two strings as shown in the fig. Find the tensions T_(1) and T_(2) in the two string.

A body of mass 1 kg is suspended from a string 1 m long it is rotated in a vertical circle , what is the tension in the string when it is horizontal and the speed of the body is 2m/s ?

The block of mass m is at rest. Find the tension in the string A .

A cylinder of mass m is suspended through two strings wrapped around it as shwon in figure . Find a. the tension T in the string and b. the speed o the cylinder as it falls through a distance h.

A body of weight 200N is suspended with the help of strings as show in Find the tensions in the strings .

A block of mass 0.2 kg is suspended from the ceiling by a light string. A second block of mass 0.3 kg is suspended from the first block through another string. Find the tensions in the two strings. Take g=10 m/s^2 .

A block of mass M is pulled on a smooth horizontal table by a string making an angle theta with the horizontal as shown in figure. If the acceleration of the block is a find the force applied by the string and by the table N on the block.