distance and time

emma123

i need some help with this:

the distance d that a certain particle moves may be calculated from the expression d=at+bt^2, where a and b are constants; and T is the elapsed time. complete the following statement: the dimensions of the quantities a and b are..., respectively

help please i don't get it... thanks

Astronuc

If d is in units of distance, e.g. meters, and time is in units of time, e.g. seconds (s), then if one were to equate d = v*t, v would have to be in units of velocity (speed), e.g. m/s,

distance = (distance/time) * time or distance (m) = velocity (m/s) * time (s). Units must be consistent.

Think about the units of acceleration.

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emma123	distance and time Tweet i need some help with this: the distance d that a certain particle moves may be calculated from the expression d=at+bt^2, where a and b are constants; and T is the elapsed time. complete the following statement: the dimensions of the quantities a and b are..., respectively help please i don't get it... thanks

Astronuc Admin	If d is in units of distance, e.g. meters, and time is in units of time, e.g. seconds (s), then if one were to equate d = vt, v would have to be in units of velocity (speed), e.g. m/s, distance = (distance/time) time or distance (m) = velocity (m/s) * time (s). Units must be consistent. Think about the units of acceleration.