FORCE & PRESSURE PART 4

žDo you play cricket? Cricket and almost every other sport rely on force to change the direction of the ball.

žThe bowler ball the ball towards the batsman but on coming in contact with the bat the ball travels in a completely different path.

žThis is because the batsman applies force on the ball in order to change the direction of the ball.

ž The steering wheel of your car works similarly. By applying force to turn the wheel, you are changing the direction in which your car is travelling.

žAn external force may cause a change in the state of motion, size and shape of an object.

žThe force may cause a change in the internal arrangement of molecules making up the object and depending upon the magnitude of the force, the size or shape of the object may change.

žAn example is the pulling force on a spring which causes its elongation, similar is the compressive force which compresses the spring.

ž In both the cases, the force causes a change in the size of the spring.

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

ž.

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

ž.

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

ž.

žHave you ever wondered why our knives need to be so sharp or why the nails we use the end with a sharp point?

ž The answers to all these questions lie in the concept of pressure.

žIt is the ratio of the force applied to the surface area over which the force is applied. 

žWe can define pressure as:

žThe force applied perpendicular to the surface of an object per unit area over which that force is distributed.

žThe SI unit of pressure is the pascal (Pa).

žA pascal can be defined as a force of one newton applied over a surface area of a one-meter square.

ž

ž.