FORCES
-Force: Push or pull that acts on an object.
-A force can cause a resting object to move, or it can accelerate a moving object by changing the objects speed or direction.
-Forces are measured by scales.
-The units for force are newtons.
Newtons Laws
-Isaac Newton summarized his study of force and motion in several laws of motion.
-According to Newtons first law of motion, the state of motion of an object does not change as long as the net force acting upon it is zero. An object at rest stays at rest. An object in motion stays in motion.
-This is also known as the law of inertia.
-Inertia: The tendency of an object to resist a change in its motion.
-Force: Push or pull that acts on an object.
-A force can cause a resting object to move, or it can accelerate a moving object by changing the objects speed or direction.
-Forces are measured by scales.
-The units for force are newtons.
Newtons Laws
-Isaac Newton summarized his study of force and motion in several laws of motion.
-According to Newtons first law of motion, the state of motion of an object does not change as long as the net force acting upon it is zero. An object at rest stays at rest. An object in motion stays in motion.
-This is also known as the law of inertia.
-Inertia: The tendency of an object to resist a change in its motion.
-According to newtons second law of motion, the acceleration of an object is equal to the net force acting on it divided by the objects mass.
-Mass: A measure of the inertia of an object and depends on the amount of matter the object contains.
- A= F/m
-Mass: A measure of the inertia of an object and depends on the amount of matter the object contains.
- A= F/m
-According to Newtons third law of motion, whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
-The force your bumper car exerts on the other car is the action force. The force the other car exerts on your car is the reaction force.
-The force your bumper car exerts on the other car is the action force. The force the other car exerts on your car is the reaction force.
Gravitational Force
-Gravity is the weakest universal force.
-Gravitational Force: An attractive force that acts between two masses.
-Newtons law of universal gravitation states that every object in the universe attracts every other object.
-For example, the earth exerts a force on an apple, and the apple exerts an equal force on earth.
-The gravitational force between two objects is proportional to their masses and decreases rapidly as the distance between them increases.
-The greater the mass of the objects, the greater their gravitational force.
-Planets orbits are due to gravity.
-The moon is held in place by earths gravitational pull.
-Gravity is the weakest universal force.
-Gravitational Force: An attractive force that acts between two masses.
-Newtons law of universal gravitation states that every object in the universe attracts every other object.
-For example, the earth exerts a force on an apple, and the apple exerts an equal force on earth.
-The gravitational force between two objects is proportional to their masses and decreases rapidly as the distance between them increases.
-The greater the mass of the objects, the greater their gravitational force.
-Planets orbits are due to gravity.
-The moon is held in place by earths gravitational pull.
Momentum
-Momentum: The product of an objects mass and its velocity.
-An object has a large momentum if the product of its mass and velocity is large.
-The momentum for any object at rest is zero.
-Momentum = Mass x Velocity
-Momentum: The product of an objects mass and its velocity.
-An object has a large momentum if the product of its mass and velocity is large.
-The momentum for any object at rest is zero.
-Momentum = Mass x Velocity
Questions
1. What is a force? (see student solutions)
2. What is the formula for momentum?(see student solutions)
3. What is newtons second law?
4. What is the force your bumper car exerts on the other bumper car?
1. What is a force? (see student solutions)
2. What is the formula for momentum?(see student solutions)
3. What is newtons second law?
4. What is the force your bumper car exerts on the other bumper car?
The light bulb application is all of Newtons laws. They literally apply to everything we do. When we push on doors, when we drive cars.. etc. Just pay attention and you will see them in your life.