Multiple choice

Which of the following is an example of contact force?

  1. Like poles of magnets repelling each other.

  2. Pressing a lump of dough to make chapatti balls.

  3. Straw rubbed with paper attracting another straw, which is not rubbed with paper.

  4. Water flowing down from a tap.

  5. Electromagnets being used to pick up metallic scrap.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pressing a lump of dough to make chapatti balls is due to muscular force (contact force).

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