9SEAL Science - Kinematics and Dynamics

Scalar quantity

a quantity that only has a magnitude

Vector quantity

a quantity that has both a magnitude and a direction

km/h to m/s

Divide by 3.6

m/s to km/h

Multiply by 3.6

displacement over time

what is velocity

Acceleration = (u-v)/t

What is acceleration

Distance = 1/2(u+v)t

Calculating distance with velocity over time graphs

What is a force

Causes an object to change its present state of motion or transfers energy to be stored or used for movement

Newton’s 1st law

every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force

Newton’s 2nd law

Net force = Mass x Acceleration

the acceleration of an object is directly related to the net force and inversely related to its mass

Newton’s 3rd law

For every action there is an equal and opposite reaction

Average velocity

(u+v)/2