A needle of length 10cm floats on water. If the force acting per unit length of the needle is 0.7N/m, calculate the surface tension supporting the weight of the needle
Student
To calculate the surface tension supporting the weight of the needle, we can use the formula:
Surface Tension = Force / Length
In this case, the force acting per unit length of the needle is given as 0.7N/m, and the length of the needle is 10cm or 0.1m. Plugging these values into the formula, we can calculate the surface tension:
Surface Tension = 0.7N/m / 0.1m
Simplifying the equation:
Surface Tension = 7N/m
Therefore, the surface tension supporting the weight of the needle is 7N/m.