Question

3. A body covers a distance of
Land 20min 7 sec. How much
| 12th sec?
a 15 m in
it alco​

Answer 1

36m in 15th second

how to solve this...

use the 2nd equation of motion...to find U(intial velocity) and A(acceleration)

It is given Distance covered by an object in 7th second. Which will be equal to( Distance covered by Object in 7sec) - (Distance covered by Object in 6sec ) = 20M

After solving the above you will be left with two variable U and A

just use the 2nd Case to determine U and A.which is distance travelled by body in 9th second. Now you have two equation and Two variable which can be easily find out.

After getting U and A you can find distance covered by Object in 15th second by

(Distance covered by body in 15sec) - (Distance covered by body in 14 sec)

which will give you 36

If you didn't understand comment I will send you a solution in copy.

Now one more thing ,

Distance covered by an object in Nth sec is given by S = u+a(2n-1)/2