Confused about wording (1 Viewer)

[kev-]

If the question asks "find the velocity at the end of 4 seconds", do we sub in t=4 or t=5?

 

[aDimitri]

4.
When t = 1, we are at the end of the first second, 1 full second has passed.
When t = 2, we are at the end of the second second (hehe), 2 full seconds have passed.
etc. t = 4 is the end of the 4th second. stupid wording though.

 

[kev-]

I'm just thinking, if the questions says "it initially starts at x=1...", t=0 is subbed in right? But initially means when it starts, so the beginning of 0 seconds, not the end of the 0th second.

 

[braintic]

I'm just thinking, if the questions says "it initially starts at x=1...", t=0 is subbed in right? But initially means when it starts, so the beginning of 0 seconds, not the end of the 0th second.

A stopwatch starts at zero, not one.

 

[aDimitri]

there is no 0th second though.

 

[kev-]

A stopwatch starts at zero, not one.

Right, so it starts at zero. If the question asked "find the velocity at the end of the 0th second", isn't t --> 1 ? So we sub in one??

 

[kev-]

there is no 0th second though.

What is 0 <= t <= 1 then? God I feel like I'm missing something very basic x_x

 

[RealiseNothing]

What is 0 <= t <= 1 then? God I feel like I'm missing something very basic x_x

The first second?

 

[kev-]

The first second?

o... yes... yes it is. thank you guys, I get it now.