POWER ENGINEERING 2A1 STUDY SHEET
ACTUAL QUESTIONS AND ANSWERS
GUARANTEED TO PASS
●● Acceleration (m/s^2)
Answer: Change in velocity (m/s) / time (s)
●● Force (Newton)
Answer: 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
Answer: mass (kg) x 9.81 m/s^2
●● Pressure (Pa)
Answer: Force (N) / area (m^2)
●● Work (J)
Answer: Force (N) x distance (m)
●● Power
Answer: Work done / time , Rate of doing work
,●● Potential Energy (J)
Answer: mass x gravity x height , the ability of a body to do work due
by virtue of its position
●● Kinetic Energy (J)
Answer: 1/2 x mass x velocity^2 , The ability of a body to do work due
to its motion
●● Energy (J)
Answer: The capacity of a body to do work
●● Tonne
Answer: 1000 kilograms
●● Moment of Force (Nm)
Answer: 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
Answer: Equal to Counter-clockwise moments
,●● Upward Forces
Answer: Equal to Downward forces
●● Actual Mechanical Advantage (Ma)
Answer: Load (N) / Effort (N)
●● Velocity Ratio (VR)
Answer: Distance moved by Effort / Distance moved by Load
●● Efficiency
Answer: Output Work / Input Work
●● Output Work
Answer: Load x Distance moved by load
●● Input Work
Answer: Effort x Distance moved by effort , Equals Output work +
Wasted work
●● Ideal Mechanical Advantage (MA)
Answer: Equal to Velocity Ratio (VR)
, ●● Load x r
Answer: Equal to Effort x R
●● VR
Answer: Equal to R/r and D/d
●● Load /Effort
Answer: Equal to R/r
●● Scalar
Answer: A physical quantity that has magnitude but no direction
●● Vector
Answer: A quantity that has magnitude and direction
●● Space Diagram
Answer: Illustrates a system of vectors
●● Co-planar Vectors
Answer: Vectors that are all in the same plane
●● Concurrent Vectors
ACTUAL QUESTIONS AND ANSWERS
GUARANTEED TO PASS
●● Acceleration (m/s^2)
Answer: Change in velocity (m/s) / time (s)
●● Force (Newton)
Answer: 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
Answer: mass (kg) x 9.81 m/s^2
●● Pressure (Pa)
Answer: Force (N) / area (m^2)
●● Work (J)
Answer: Force (N) x distance (m)
●● Power
Answer: Work done / time , Rate of doing work
,●● Potential Energy (J)
Answer: mass x gravity x height , the ability of a body to do work due
by virtue of its position
●● Kinetic Energy (J)
Answer: 1/2 x mass x velocity^2 , The ability of a body to do work due
to its motion
●● Energy (J)
Answer: The capacity of a body to do work
●● Tonne
Answer: 1000 kilograms
●● Moment of Force (Nm)
Answer: 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
Answer: Equal to Counter-clockwise moments
,●● Upward Forces
Answer: Equal to Downward forces
●● Actual Mechanical Advantage (Ma)
Answer: Load (N) / Effort (N)
●● Velocity Ratio (VR)
Answer: Distance moved by Effort / Distance moved by Load
●● Efficiency
Answer: Output Work / Input Work
●● Output Work
Answer: Load x Distance moved by load
●● Input Work
Answer: Effort x Distance moved by effort , Equals Output work +
Wasted work
●● Ideal Mechanical Advantage (MA)
Answer: Equal to Velocity Ratio (VR)
, ●● Load x r
Answer: Equal to Effort x R
●● VR
Answer: Equal to R/r and D/d
●● Load /Effort
Answer: Equal to R/r
●● Scalar
Answer: A physical quantity that has magnitude but no direction
●● Vector
Answer: A quantity that has magnitude and direction
●● Space Diagram
Answer: Illustrates a system of vectors
●● Co-planar Vectors
Answer: Vectors that are all in the same plane
●● Concurrent Vectors
