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If the surface tension of a liquid is 0.072 N/m, what is the force acting on a w

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Question: If the surface tension of a liquid is 0.072 N/m, what is the force acting on a wire of length 0.5 m placed on the surface of the liquid?

Options:

  1. 0.036 N
  2. 0.072 N
  3. 0.144 N
  4. 0.5 N

Correct Answer: 0.036 N

Solution: 

Force = Surface Tension × Length = 0.072 N/m × 0.5 m = 0.036 N.

If the surface tension of a liquid is 0.072 N/m, what is the force acting on a w

Practice Questions

Q1
If the surface tension of a liquid is 0.072 N/m, what is the force acting on a wire of length 0.5 m placed on the surface of the liquid?
  1. 0.036 N
  2. 0.072 N
  3. 0.144 N
  4. 0.5 N

Questions & Step-by-Step Solutions

If the surface tension of a liquid is 0.072 N/m, what is the force acting on a wire of length 0.5 m placed on the surface of the liquid?
  • Step 1: Understand that surface tension is a force per unit length acting along the surface of a liquid.
  • Step 2: Identify the given values: Surface tension = 0.072 N/m and Length of the wire = 0.5 m.
  • Step 3: Use the formula to calculate the force: Force = Surface Tension × Length.
  • Step 4: Substitute the values into the formula: Force = 0.072 N/m × 0.5 m.
  • Step 5: Perform the multiplication: 0.072 × 0.5 = 0.036.
  • Step 6: Conclude that the force acting on the wire is 0.036 N.
  • Surface Tension – Surface tension is the force per unit length acting at the surface of a liquid, which causes it to behave like a stretched elastic membrane.
  • Force Calculation – The force acting on an object at the surface of a liquid can be calculated by multiplying the surface tension by the length of the object in contact with the liquid.
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