Physics Normal and Contact Forces - Revised
Gain a better understanding of Newton's first law of motion, gravity, normal force, and friction with this course.
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Newton's first law states that an object at rest will stay at rest while an object in motion will stay in motion unless there is some unbalanced or net force. This course will first introduce you to a normal force which is the force when an object is resting on any surface that is perpendicular to the surface of the object. You will learn that if two surfaces are not in contact, they can't exert a normal force on each other.
Gravity decreases in strength the further you move away from the center of the earth. This course will discuss the force of gravity which is equal to mass times the gravitational field of the earth, about 9.8 meters per second. You will learn that a net force is mass times acceleration, and that to calculate the rate acceleration of an object, you divide the force of the direction it’s moving by the mass of the object. You will also study kinetic friction and static friction.
Kinetic friction is a force that acts between moving surfaces and static friction is a force that keeps an object at rest. By taking this course, you will learn how to calculate the static and kinetic friction on a stationary object to be moved along a surface. So, check out the course and start learning about the dynamics of moving objects on specific surfaces, today.
Understanding Normal and Contact Forces
Learning Outcomes - Physics Normal and Contact Forces
Normal Force and Contact Force
Normal Force in an Elevator
Inclined Plane Force Components
Ice Accelerating Down an Incline
Force of Friction Keeping the Block Stationary
Force of Friction Keeping Velocity Constant
Intuition on Static and Kinetic Friction Comparisons
Static and Kinetic Friction Example
Lesson Summary - Physics Normal and Contact Forces
Upon the completion of this course you will be able to:
- Explain what the what normal and contact force are.
- Calculate normal force.
- Explain the components of the force of gravity.
- Describe static and kinetic friction and their differences.
- Calculate the static and kinetic friction on a stationary object to be moved along a surface.
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