How does the shape of a thumb pin help it penetrate surfaces easily?

A thumb pin has a sharp, pointed end and a wide, flat head. The pointed end has a small surface area, which concentrates force and increases pressure, allowing it to penetrate surfaces with minimal effort. The flat head provides a large area for applying force, making it easy to push in.

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  10. Q.1 How does physics play an important role in our life?
  11. Q.2 Estimate your age in minutes and seconds.
  12. Q.3 What base quantities are involved in these derived physical quantities; force, pressure, power and charge.
  13. Q.4 Show that prefix micro is thousand times smaller than prefix milli.
  14. Q5. Justify that displacement is a vector quantity while energy is a scalar quantity.
  15. Q6. Screw gauge can give more precise length than vernier calipers. Briefly explain why?
  16. Q.7 Differentiate between Mechanical Stopwatch and Digital Stopwatch.
  17. Q.8 How measuring cylinder is used to measure the volume of an irregularly shaped stone?
  18. Q.9 What precautions should be kept in mind while taking measurements using a measuring cylinder?
  19. Q.10 Why do we need to consider significant digits in measurements?
  20. Q12. Differentiate between precision and accuracy.