A body covers 20 m, 22 m, 24 m, in 8th, 9th and 10th seconds respectively. The body starts

Question

A body covers 20 m, 22 m, 24 m, in 8th, 9th and 10th seconds respectively. The body starts (A) from rest and moves with uniform velocity (B) from rest and moves with uniform acceleration (C) with an initial velocity and moves with uniform acceleration (D) with an initial velocity and moves with uniform velocity

Tardigrade Admin · Accepted Answer

Dn=u+(a/2)(2n-1) ; D8=20 m and D9=22 m ∴ 20=u+(a/2)(2×8-1)=u+(15/2)a ldots(i) ∴ 22=u+(a/2)(2×9-1)=u+(17/2)a ⋅s(ii) On solving eqn. (i) and (ii) we get ; u = 5 m s-1, a = 2 m s-2

Q. A body covers $20 m$ , $22 m$ , $24 m$ , in $8^{t h}$ , $9^{t h}$ and $1 0^{t h}$ seconds respectively. The body starts

from rest and moves with uniform velocity

from rest and moves with uniform acceleration

with an initial velocity and moves with uniform acceleration

with an initial velocity and moves with uniform velocity

$D_{n} = u + \frac{a}{2} (2 n - 1); D_{8} = 20 m$ and $D_{9} = 22 m$
$∴ 20 = u + \frac{a}{2} (2 \times 8 - 1) = u + \frac{15}{2} a \dots (i)$
$∴ 22 = u + \frac{a}{2} (2 \times 9 - 1) = u + \frac{17}{2} a \dots (ii)$
On solving eqn. $(i)$ and $(ii)$ we get ;
$u = 5 m s^{- 1}$ , $a = 2 m s^{- 2}$

Q. A body covers 20m, 22m, 24m, in 8th, 9th and 10th seconds respectively. The body starts