A pin is squeezed between finger and thumb. Which statement is correct?
1)The force of the pin is larger on the finger than on the thumb.
2)The force of the pin is smaller on the thumb than on the finger.
3)The pressure of the pin is larger on the finger than on the thumb.
4)The pressure of the pin is larger on the thumb than on the finger.
Answers
Answer:
Pressure is the force per unit area. When a force acts over a large area of the object, it produces a small pressure. But if the same force acts over a small area of the object, it produces a large pressure. In this case surface area of pintip is less than the surface area of pinhead. So pressure is more in man’s thumb.
4)The pressure of the pin is larger on the thumb than on the finger.
A unit of pressure is described as the force applied across a unit area. Pascals are a unit of measurement for pressure (Pa). When a gas is trapped in a balloon, a few of the molecules clash with the balloon's surface, causing pressure to be observed. At a place inside a gas, pressure operates in all directions. The pressure force at the surface of a gas acts perpendicular to the tip. When the gas moves as a whole, the measured pressure changes in the direction of the motion.