Question

Hey plz tell me why in this ques we take time = t-1 ???????

Answer 1

Answer:

here the question is "find the displacement of the particle in the last 1 sec."

actual time or present time is t.

and here , in case of 1 sec before the particle's position, we denote it (t - 1) i.e, present time minus 1sec, or,the particle's position 1 sec before of present time

I hope I can explain it to you.