Kinematics

Which suvat may be appropriate here (write down clearly what youre given).

Reply 2

OP

I think S=ut + 1/2at^2
S=120 , U=6 , A=0.6 , t= ? Is that correct?

(edited 4 months ago)

Reply 3

Original post by Josephbrian

I think S=ut + 1/2at^2
S=120 , U=6 , A=0.6 , t= ? Is that correct?

You dont know u, as youre told the velocity increases by 6m/s over that time, so it cant be that one. Think about which suvats involve acceleration and time and whether you know the other "two" things.

Reply 4

OP

Original post by mqb2766

You dont know u, as youre told the velocity increases by 6m/s over that time, so it cant be that one. Think about which suvats involve acceleration and time and whether you know the other "two" things.

S=vt - 1/2at^2. Or v=u + at that’s if u is 0. So which is it and what are the values for suvat?

Reply 5

Original post by Josephbrian

S=vt - 1/2at^2. Or v=u + at that’s if u is 0. So which is it and what are the values for suvat?

Id rearrrange v=u+at and note that 6 is the change in velocity so ...

Reply 6

OP

Original post by mqb2766

Id rearrrange v=u+at and note that 6 is the change in velocity so ...

Is it like this 6=0+0.6*t to get 10s ? What is ur answer for question?

Reply 7

Original post by Josephbrian

Is it like this 6=0+0.6*t to get 10s ? What is ur answer for question?

Yes, though its incorrect to assume u=0. You should really just write it down as the definition of (constant) acceleration is
acceleration = change in velocity / change in time
so
0.6 = 6/t
The v=u+at is the basic gcse suvat which wraps that up.

(edited 4 months ago)

Reply 8

OP