2p1 Mechanics Flashcards
Are these quantities scalar or vector
Mass
Force
Momentum
Gravitational field strength
Work
Mass - scalar
Force - vector
Momentum - vector
Gravitational field strength - vector
Work - scalar
Are these quantities scalar or vector
Pressure
Specific heat capacity
Latent heat
Density
Power
Pressure - scalar
Specific heat capacity - scalar
Latent heat - scalar
Density - scalar
Power - scalar
Are these quantities scalar or vector
Resistance
Current
Charge
Temperature
Energy
Impulse
Resistance - scalar
Current - scalar
Charge - scalar
Temperature - scalar
Energy - scalar
Impulse - vector
Are these quantities scalar or vector
Magnetic field strength
Voltage
Frequency
Gravitational potential
Electric field strength
Wavelength
Magnetic field strength - vector
Voltage - scalar
Frequency - scalar
Gravitational potential - scalar
Electric field strength - vector
Wavelength - scalar
How are vectors notated
bold letter, underlined letter or letter with arrow above it
How to use scale drawings to resolve vectors
use appropriate scale and note scale down on page
next using a ruler and protractor draw the vector with the angle to the horizontal
draw the horizontal and vertical components
finally measure the length of the components and use scale to convert back
What is the equation for momentum with units
momentum (kg m/s) = mass (kg) x velocity (m/s)
What is the definition and equation for work done
work done is the force causing by a motion multiplied by the distance in the direction of motion
work done (J) = Force (N) x distance (m)
What is power and the equation for it
power is the rate of energy transfer
power (W) = energy/work done (J) / time(s)
what is efficiency and the equation
efficiency is a measure of how efficiently a system transfers energy
efficiency = useful power/energy output / total power/energy input
