scalar and vector quantities

physics

what is a scalar quantity?

a quantity that only has magnitude (size)

what is a vector quantity?

a quantity that has both size and direction

mass?

scalar

energy?

scalar

distance?

scalar

speed?

scalar

time?

scalar

power?

scalar

force?

vector

displacement?

vector

velocity?

vector

acceleration?

vector

momentum?

vector

weight?

vector

what is the equation for velocity?

v = x/t

what is the unit for v in the equation for velocity?

m/s or km/hr

what is the unit for x in the equation for velocity?

m (distance)

what is the unit for t in the equation for velocity?

s (time)

what is the speed for sound?

330 m/s

what is the speed for walking?

~1.5 m/s

what is the speed for running?

~5 m/s

what does average speed mean?

speed for the whole journey

what does instantaneous speed mean?

speed at that time

what equipment should you use in a speed vs velocity practical?

light gates

how do you minimise errors in a velocity vs speed practical?

vocal prompt, light gates

what are light gated attached to?

a date logger

what are the benefits of using a light gate?

reduce human error, have more precise timing with their dp and sf