Quote:density is not a factor as there is no air resistance to calculate
a=v/t
v= at
t=v/a
d = 1/2 a t^2
note: a and v have opposite signs (+/-) so initial velocity equation (d = vt + 1/2 a t^2) is redundant.
where a = acceleration (9.90m/s^2)
v= velocity of 20m/s
t = time (1 sec, 2 secs etc)
d= distance travelled (m) (convert to cm at end)
yes you are correct. density is not a factor, but you are missing out on the crucial formula: v^2=u^2+2as
where v=final velocity, in this case 20m/s
u=initial velocity, in this case 0m/s
a=acceleration, in this case 9.90m/s^2
and s=displacement, which we want to find out
substituting the values in, we get
(20)^2=0^2+2(9.90)(s)
s= 20.2m
=2020cm(rounded off)
well, at least that's wat i got...anyone else with the same answer?
Quote:density is not a factor as there is no air resistance to calculate
a=v/t
v= at
t=v/a
d = 1/2 a t^2
note: a and v have opposite signs (+/-) so initial velocity equation (d = vt + 1/2 a t^2) is redundant.
where a = acceleration (9.90m/s^2)
v= velocity of 20m/s
t = time (1 sec, 2 secs etc)
d= distance travelled (m) (convert to cm at end)
yes you are correct. density is not a factor, but you are missing out on the crucial formula: v^2=u^2+2as
where v=final velocity, in this case 20m/s
u=initial velocity, in this case 0m/s
a=acceleration, in this case 9.90m/s^2
and s=displacement, which we want to find out
substituting the values in, we get
(20)^2=0^2+2(9.90)(s)
s= 20.2m
=2020cm(rounded off)
well, at least that's wat i got...
I answered it at about 1:30 AM Thursday morning, Neopian time, do you think that's early enough to get the first place trophy?
how many neopoints do you guys have?
saving up for a mystery island paint brush for my kourgra.