Forces A force is a push or pull that can change motion.
Forces are measured in pounds (lbs) in the english system and Newtons (N) in the SI (metric) system.
A force is a vector and can be represented by an arrow. the point of the arrow indicates the directions of the force and the length of the arrow idnicates the strength of the force.
Objects exert force by contact or touching like Friction.
Forces can also occur "at a distance" without any contact with other objects. This is Gravity, Magnetism, and electricity.
Friction is force that opposes motion. Sliding fricition occurs between two moving surfaces. Static fricition occurs between two stationary surfaces. We want to reduce friction between moving surfaces to reduce wear. In some cases we want to increase friction like treads on sneakers and tires.
A free body diagram shows all the forces acting on an object. When the forces add up to 0 there will be no change in motion. they are called balanced forces.
Weight is a force that is calculated by mass times gravity. and on earth gravity is 9.8 meters/secound squared.
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Forces are measured in pounds (lbs) in the english system and Newtons (N) in the SI (metric) system.
A force is a vector and can be represented by an arrow. the point of the arrow indicates the directions of the force and the length of the arrow idnicates the strength of the force.
Objects exert force by contact or touching like Friction.
Forces can also occur "at a distance" without any contact with other objects. This is Gravity, Magnetism, and electricity.
Friction is force that opposes motion. Sliding fricition occurs between two moving surfaces. Static fricition occurs between two stationary surfaces. We want to reduce friction between moving surfaces to reduce wear. In some cases we want to increase friction like treads on sneakers and tires.
A free body diagram shows all the forces acting on an object. When the forces add up to 0 there will be no change in motion. they are called balanced forces.
Weight is a force that is calculated by mass times gravity. and on earth gravity is 9.8 meters/secound squared.
