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Question

A contact force cannot act through
  1. Empty space
  2. Touching
  3. Touching with a wooden rod
  4. Touching with a metal rod

A
Empty space
B
Touching
C
Touching with a wooden rod
D
Touching with a metal rod
Solution
Verified by Toppr

Answer is A.

Contact forces are such forces that are exerted on objects by direct contact. In other words, The forces which acts on bodies when they are in actual contact are called the contact forces.
Hence, they cannot act through empty space.

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