# Forces Vocab

Forces Vocab
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The overall force acting on an object and this shows the net force of the object.

The ratio of the frictional resistance force to the normal force which presses the surfaces together.

This picture shows that static friction is between two objects that are not moving.

The friction between a moving object. This picture shows that the object is moving and causing friction

In mechanics, the normal force is the component, perpendicular to the surface of contact, of the contact force exerted on an object by, for example, the surface of a floor or wall, preventing the object from penetrating the surface. This picture shows this by demonstrating where the normal force is.

This shows how weight is a measurement of how heavy an object is in an exact measurement.

This shows that it is the measurement of the relative weight and usually has no definite shape.

This shows that every action as an equal and opposite reaction. (Newton's 3rd Law)

This explains how an objects mass determines the amount of force needed to move it

This shows the objects resistance to change its motion by the rest of the car still traveling in the direction even though a wall as abruptly stopped it.

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This depicts that an object in motion will stay in motion. This is shown by the man still traveling the speed of the car even though it has come to an abrupt stop.

This depicts opposing forces going against each other.

Static friction: friction between toe or more objects that are not moving relative to each other. The picture shows an object that is not moving.

Normal Force: The upward force which acts upon an object resting on a horizontal surface, balancing the force of the weight of the object. In this picture the normal force balances with the boxes weight

Newton's 3rd Law: For every action, there is an equal and opposite reaction. This guy is shooting a gun, the bullet is the action and the recoil is the opposite reaction, which is pushing the man back.

### Calculate Mass

Mass: the quantity of matter that a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field. This picture shows that mass in measured in Kilograms and that the object has a certain mass

Kinetic Friction- energy of motion, equal to half the mass multiplied by the speed squared. the man pulling the casket shows friction.

Natural Force: In mechanics, the normal force is the component, perpendicular to the surface of contact, of the contact force exerted on an object by. Natural force basically keeps the mass from penetrating the surface.

Newtons 1st Law (object at rest) : An object at rest stays at rest with the same speed and in the same direction unless acted upon by an unbalanced force. The picture shows an image of an object at rest.

Newtons second law states that force equals mass times acceleration. This picture depicts this well by showing an elephant will require a lot of force to get it moving but it will have a lot of force when it is moving because of its large mass

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