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Answer:
•A force is an effort that changes the state of an object at rest or at motion. It can change an object's direction and velocity. Force can also change the shape of an object.
Contact force occurs due to the contact between two different objects. Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects. There is no field linked with the contact force.
• A flat shoe increases the area of contact with the ground . Hence , the pressure ( force / area) on the ground is much less in case of a flat shoe as compared to a pencil heeled shoe and walking is easier.
• The Force exerted on a surface per unit area is called pressure. Pressure is inversely proportional to the area on which it is applied. That is, when the area is increased the pressure exerted by applying a force is less.
•A large amount of atmospheric pressure acts on us but we do not experience its effect because the internal body pressure or blood pressure is greater in amount than the external atmospheric pressure. ... That's why we do not feel any kind of excessive weight among us due to external atmospheric air pressure.
•Humans are used to only a specific range of pressures. Deep sea divers will have an atmospheric diving suit which block the heavy pressure of the water around them, and keep a decent pressure inside.
• two persons applying forces on two opposite sides of a moving cart. the cart still moves with the same speed in the same direction. ... Hence the two forces cancel each other and no resultant force acts on the body so it continues to move in the same direction with the same speed following Newton's first law of motion.
• The SI unit of force is the newton, symbol N.
• Take a rubber ball and place it on table top. Now gently push the ball along the surface of table, the ball begins to move. Thus a ball at rest begins to move when a force is applied to it.
• Example of force stoping a body: A fielder on the ground stops a moving ball by applying a force with his hands.
• A force is an effort that changes the state of an object at rest or at motion. It can change an object's direction and velocity. Force can also change the shape of an object.
• All fluids exert pressure like the air inside a tire. The particles of fluids are constantly moving in all directions at random. As the particles move, they keep bumping into each other and into anything else in their path. These collisions cause pressure, and the pressure is exerted equally in all directions.
• Shape of toothpaste tube changes when we squeeze it because Force is applied on it. Conclusion: Hence, when we apply force with our fingers on toothpaste, the shape. The shape of ointment change because As we know that pressure is force per unit area .
• The speed and direction of motion can be changed by applying force on an object and thus a force can bring a change in the state of motion of an object.
• magnetic force can be used.
• muscular force is applied be animals while doing these activities.
hope this helps ☺️
Answer:
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