Question

Sn=u+a/2(2n-1) when this equation is considered

Answer 1

That equation is used to find distance travelled by body moving with constant acceleration in nth second of motion.

For e.g. if you want the displacement travelled in 7th second of motion then substitute n = 7 in that equation.
If you want displacement travelled in 7 seconds then use S = ut + 0.5at^2

Answer 2

Answer:

equation is considered when distance travelled by the body moving is given and we have to find the displacement in the nth

second

Step-by-step explanation:

hope its help