Scaled area under a current-time curve = charge which has flowed
(conductivity & resistivity)
(stress)
(strain)
Scaled area under a force-extension curve = energy stored
Gradient of a stress-strain curve is the Young modulus
Scaled area under a velocity-time curve = distance travelled
Gradient of a distance-time curve is velocity
Gradient of a velocity-time curve is acceleration
For a vector A making an angle q with the horizontal,
Horizontal component of A
= A cos q
Vertical component of A = A sin q