Notes Forces Force A push or a pull

Notes: Forces

Force. A push or a pull exerted on an object.

Forces can affect motion in several ways: 1. 2. 3. 4. 5. 6. → start moving → move faster → move slower → stop moving → change direction → change shape

FORCE FACTS: → Forces are measured in Newtons (N) with a tool called a spring scale. → Forces usually act in pairs. → Forces act in a particular direction.

Gravity The force of attraction between all objects. Mass and distance have an effect on gravity.

Friction. A force that opposes motion between two surfaces that are touching. Friction will cause an object to slow and eventually stop. Some surfaces have more friction than others.

Forces and Direction: More than one force can act on an object at a time. The forces can push or pull in any direction. What happens to the object when the forces act depends on two things: 1. → How strong the forces are 2. → The direction of the forces

Net Force: The overall force on an object when all the individual forces acting on an object are added together.

Calculating Net Force: When two or more forces are combined. To find the net force when forces are acting in opposite directions, simply subtract the smaller force from the larger force. To find the net force when forces are acting in the same direction, simply add them together.

What is the net force?

Balanced Force: Equal forces acting on an object in opposite directions. When a net force is zero, the forces are balanced. Balanced forces DO NOT cause changes in motion.

Unbalanced Force: A nonzero net force that changes an object’s motion. When a net force is greater than zero, the forces are unbalanced.

Calculating Force= Mass x Acceleration Force= 25 kg x 4 m/s 2 Force= 100 N