Question

A body starting from rest has an acceleration of 5 m/s. Calculate the distance travelled by
in 4th second

ans is 17.5 but how??​

Answer 1

Answer:

20 meter

Explanation:

• speed=distance/ time

therefore,

• speed (acceleration) = 5m/s
• time = 4 th sec
• distance= ?

therefore,

5=distance/4

distance=5*4

=20meter

Answer 2

Answer:

Distance travelled in 4th second = 1/2 a (4)^2 - 1/2 a (3)^2

                                                       = 7/2 a

                                                         = 7 * 5 / 2 = 17.5 m

I hope it helps .