Physics-Forces

Scalar vs Vector

Both have maginitude, Vector also has direction

Distance

Scalar

Displacement

Vector

Speed

Scalar

walking speed

1.5m/s

running speed

3m/s

cycling speed

6m/s

car speed

25m/s

train speed

55m/s

plane speed

250m/s

sound in air speed

330m/s

Velocity

Vector

Motion in a circle contains…

constant speed but changing velocity

state newtons first law

an object at rest will stay at rest and a moving object will continue to move at a constant velocity if there is no external resultant force acting on the object

state newtons second law

an object with a resultant force applied to it will undergo a change in speed or a change in direction, if the reultant force is in the direction of motion the object accelerates, if it is in the opposite direction it will decelerate

state newtons third law

for every action force acting on an object there is an equal and opposite reaction force action on another object

Center of Mass

the point at which weight may be considered to ac

Force

Vector

Hooke’s Law

the extension of an elastic object is directly proportional to the force applied, providing that the limit of proportionality is not exceeded

Inertia

the tendancy of an object to contubue in its state of rest or motion