Engineering External preperation Flashcards
(24 cards)
what are the four types of motion?
Linear, Rotary, Oscillatory and Reciprocal
What kind of motion is Linear Motion?
Motion in a straight line (single direction)
What kind of motion is Rotary Motion?
circular motion
What kind of motion is Reciprocal Motion?
motion that changes circular motion to a linear back-forward motion (think a car piston)
What kind of motion is Oscillatory Motion?
back and forward motion around a fixed point (think a pendulum)
Define mechanical Advantage
Load/Effort
Define Velocity Ratio
distance moved by effort/distance moved by load
Work = ?
Force x Distance
Power =
Work / Time
What is kinetic Energy?
movement of mechanical energy measured in Joules
What is Potential Energy?
the determination of the stored energy of an object with mass ‘m’.
What is the Law of conservation of energy?
Energy cannot be created nor destroyed bu can be tranferred from one to another (assuming 100% efficiency)
Label the acronym SUVAT
S = displacement, U = initial velocity, V = final velocity, A = acceleration, T = time
What is friction?
a force that opposes the direction of motion (measured in Newtons)
Define the Normal Force
the force perpendicular to a surface that an object is resting
What is the formula to solve Friction?
Ff =μ×Fn
What is Elasticity?
property of a material to regain its original shape after deformation when the external forces are removed.
What is Plasticity?
retains the deformation produced under load permanently.
What is Ductility
Ductility is the property of a material enabling it to be drawn into a wire with the application of a tensile force.
What is Malleability?
. A malleable material should be plastic, but it is not essential to be so strong.
what is Brittleness?
It is the property of breaking of a material with little permanent distortion.
What is Hardness?
as resistance to wear, scratching, deformation and machinability etc. Also, it is the property of a metal, which gives it the ability to resist being permanent.
What is Stiffness?
Stiffness is the ability of a material to resist deformation under stress
What is Toughness?
Toughness is the property of a material to resist fracture due to high impact. It is measured by the amount of energy the material can absorb before failure.
