INERTIA
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Inertia is the tendency of an object to resist changes in its motion. It is defined as the property of matter to remain at rest or remain in motion with the same speed and direction unless acted upon by an external force. There are three types of inertia: inertia of rest, inertia of direction, and inertia of motion. Inertia of rest is an object's resistance to starting motion from a state of rest. Inertia of direction is an object's resistance to changing its direction of motion without an external force. Inertia of motion is an object's resistance to changing its speed or stopping its motion without an external force applied.
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This document discusses forces and their effects. It states that forces acting in the same direction add together, while forces acting in opposite directions result in the difference between the forces. A force can change an object's state of motion by changing its speed or direction, or both. A force is also needed to change an object's shape. The strength of a force is expressed by its magnitude. Multiple choice questions review the key points around state of motion, how net force is calculated, and identifying the greater of two opposing forces based on the direction an object moves.
FORCE & LAWS OF MOTION
This document discusses Newton's laws of motion and related concepts in physics. It defines force and describes how force can affect motion by changing an object's speed, direction, or shape. It then explains Newton's three laws: (1) an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force, (2) the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, and (3) for every action, there is an equal and opposite reaction. It also discusses concepts like inertia, momentum, and conservation of momentum.
Chapter 3 dynamics
Forces can move, stop, or change the direction of motion of an object. Inertia is an object's resistance to changes in its motion due to its mass. Momentum is the quantity of motion an object has, defined as its mass times velocity. Newton's three laws of motion describe the relationship between an object and the forces acting upon it. The law of conservation of momentum states that the total momentum of an isolated system remains constant. Friction opposes motion and can be advantageous or disadvantageous depending on the situation. Uniform circular motion requires a centripetal force directed toward the center of rotation.
sect17_slidesppt34.ppt
This document summarizes key concepts about forces and motion from a physics textbook chapter. It defines a force as a push or pull that can cause motion or change an object's speed or direction. There are four main types of friction: static, sliding, rolling, and fluid friction. Gravity pulls objects downward toward Earth's center, while air resistance opposes the downward motion of falling objects. A projectile follows a curved path due to the combination of its initial forward velocity and gravity pulling it downward.
1st Law.pptx
Newton's first law of motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. It describes the tendency of objects to resist any change in their state of motion. The document provides explanations of examples that illustrate Newton's first law, such as blood rushing to the feet when an elevator abruptly stops, or a person flying off a skateboard when it hits a rock. Galileo refined the concept of inertia, which is an object's resistance to changes in its motion.
1st Law.pptx
Newton's first law of motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. It describes the tendency of objects to resist any change in their state of motion. The document provides explanations of examples that illustrate Newton's first law, such as blood rushing to the feet when an elevator abruptly stops, or a person flying off a skateboard when it hits a rock and stops suddenly. Galileo refined the concept of inertia, which is an object's resistance to changes in its motion.
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INERTIA
- 1. INERTIA BY MANASA.R M2 9TH This Photo by Unknown author is licensed under CC BY-SA-NC.
- 2. INERTIA • Inertia is a word we use when we talk about matter and movement. • Inertia is the quality in matter (matter is anything you can touch) that lets it stay still if it is still, or keeps it moving if it is moving. • If you want to overcome inertia, you have to apply a force. • A force will make something that is still start to move, like flicking a wad of paper with a pencil will make it move. • Also force, due to resistance, will slow or stop something that is already moving. • The wad of paper will be slowed by resistance made by rubbing up against the air it is passing through. This Photo by Unknown author is licensed under CC BY.
- 3. TYPES OF INERTIA •Inertia of rest •Inertia of direction •Inertia of motion This Photo by Unknown author is licensed under CC BY.
- 4. Inertia of rest • Inertiaof rest is defined as the propertyby virtue of which a bodycontinuesto be at rest unless acted by some external forceto changethat condition. • inertia of motion is definedas the propertyby virtueof which a body continues to be in motion along a straightlineunless acted upon by some externalforceto changethat condition. • inertia of motion alonga particular directionis definedas the propertyby virtueof which the bodycontinuesin that particulardirectionunless acted upon by some forceto changethat direction. This Photo by Unknown author is licensed under CC BY-NC.
- 5. Inertia of direction • A body moving in a certain direction cannot change its direction without any force being applied on it. • It is the property due to which a body maintains its sense of direction. • Ex: When we travel by a motorcar and if it makes a sharp turn at a high speed, we tend to get thrown to one side. • This is an explanation for the law of inertia. • We have the tendency to continue in our straight- line motion. • When an unbalanced force is applied to change the direction of motion of the motorcar, we slip to one side of the seat due to the inertia of direction of our body.
- 6. Inertia of motion • If a bodyis in a stateof motion, then it will continueto move at the same speed in the same directionunlessan externalforceis applied to changeitsstate. • examples of inertia of motion in dailylife: • when seated on a motorcycleand the motorcyclistsuddenly applies brakes, we get a push in the forward direction. • thisis becausewe were in motion,and inertia tendsto oppose the changein our state. • when a personjumps out of a movingbus, he tends to move ahead or fall down. • thisis becausehe was in motion. • on jumping, his feet touch the groundbut the rest of the body still tendsto remainin motion.