4th Class Power Engineering Part A Exam Latest Update Graded A+

4th Class Power Engineering Part A Exam Latest Update Graded A+ Velocity (m/s) Change in position / time Acceleration (m/s^2) Change in velocity (m/s) / time (s) Force (Newton) mass (kg) x acceleration (m/s^2) , any action on a body that tends to change its size, shape, or its state of rest or motion Force of Gravity mass (kg) x 9.81 m/s^2 Pressure (Pa) Force (N) / area (m^2) Work (J) Force (N) x distance (m) Power Work done / time , Rate of doing work Potential Energy (J) mass x gravity x height , the ability of a body to do work due by virtue of its position Kinetic Energy (J) 1/2 x mass x velocity^2 , The ability of a body to do work due to its motion Energy (J) The capacity of a body to do work Tonne 1000 kilograms Moment of Force (Nm) Force (N) x Distance (m) , A force, acting on a body at any distance from a point on that body, will tend to produce rotation around that point Clockwise Moments Equal to Counter-clockwise moments Upward Forces Equal to Downward forces Actual Mechanical Advantage (Ma) Load (N) / Effort (N) Velocity Ratio (VR) Distance moved by Effort / Distance moved by Load Efficiency Output Work / Input Work Output Work Load x Distance moved by load Input Work Effort x Distance moved by effort , Equals Output work + Wasted work Ideal Mechanical Advantage (MA) Equal to Velocity Ratio (VR) Load x r Equal to Effort x R VR Equal to R/r and D/d Load /Effort Equal to R/r Scalar A physical quantity that has magnitude but no direction Vector A quantity