Mechanical quantities Flashcards
Define pressure with SI units
Force per unit area, measured in pascals (Pa)
Define acceleration with SI units
The rate of change of velocity of an object, measured in metres per second squared (m/s^2)
Define mechanical power with SI units
The amount of work done by an object, measured in Watts (W)
Define kinetic energy with SI units
The amount of energy possessed by an object due to its motion, measured in Joules (J)
Define torque with SI units
Twisting or rotational force around an axis, measured in Newton Metres (Nm)
Define angular velocity with SI units
The rate of change of angular position of an object over a certain time, measured in radians per second (rad/s)
Define shear stress with SI units
Force causing deformation of an object along a plane parallel to the imposed stress, measured in Pascals (Pa)
Define displacement with SI units
The shortest Vector quantity between the initial and final position of an object, measured in metres (m)
Give one example of energy loss in a mechanical system
Heat loss from friction between components
Define work done with SI units
It is the force applied to a object multiplied by the distance the object moves through, measured in Joules (J)
Define strain with SI units
It is a measure of the change in shape of an object due to the stress being imposed on it (change in length:original length
Define speed with SI units
It is a scalar quantity of distance travelled per unit time, measured in metres per second (m/s)
Define friction with SI units
It is a force which opposes motion or the tendency for that object to move when that object is in contact with another surface, measured in Newtons (N)
