Newtons law of motion

Force is an interaction between 2 bodies/ body & its environment. Vector quantity where there is a push & pull action. Study of Dynamics

Newtons law of motion

Force is an interaction between 2 bodies/ body & its environment. Vector quantity where there is a push & pull action. Study of Dynamics

Contact force

Refers to a direct contact.

Applied force

Drag force 

Spring force

Frictional force

Normal force

Example of contact force

Non-contact force

Separated by distance

Gravity

Magnetic force 

Electric force

Example of non-contact force 

Friction

Resists motion between materials in contact & Always goes opposite of the objects direction. Independent of the surface area of the two bodies (doesn’t matter if same object & mass

First law of motion; law of inertia 

a body continues at its state of rest/ constant motion or velocity in a straight line unless acted upon by an unbalanced/ external force 

If the net force is not equal to 0 newtons

How can you say that there is an unbalanced force

Inertia

Property where the body remains motionless & keep moving once it is set

Normal force

Perpendicular contact force that is exerted by a define surface

2nd law of motion; law of acceleration

Acceleration of the body is directly proportional to the net force and inversely proportional to its mass.

Mass

Amount of matter in a body where This is a constant in a body

Weight 

Measure of the force of gravity exerted by earth on it . Depends on mass of the object & value of acceleration due to gravity.

3rd law of motion

For every action there is an equal and opposite reaction.

Free body diagram

Help identify relevant forces by showing the body free of surroundings with vectors drawn to identify the direction and magnitude of the forces interacting with the body.

Tension

Force transmitted through a connecting material

Applied force

Directly exerted by a person on an object 

1. Normal force (higher normal force; higher friction)

2. Static friction (2 object are at rest relative to each other; applied force must be greater than static friction)

3. Coefficient of friction of 2 objects in contact (lower #; lower friction)

What affects friction?

True

Static friction is greater than kinetic friction

Kinetic friction

Present when one object is sliding over the other, small applied force is needed

True

Forces only exists as a result of an interaction