,body moving with uniform retardation covers 3 km before its speed is

1.	,body moving with uniform retardation covers 3 km before its speed is reduced to half of its initial value. It(2) A is moving with increasing speedmoving with non-zero constant acceleration (4) Acceleration of A may be constantcomes to rest in another distance of(1) 1 km(3) 3 km(2) 2 km(4) kmash Educational Services
Answer» let the initial velocity be u , and retardation is a.so, when velocity is u/2 distance covered is 3kmusing V² = u²-2as => (u/2)² = u² -2a(3)=> 6a = 3u²/4 => a = u²/8 so , now when V = 0the 0 = (u/2)² -2a(s)=> s = u²/8a but a = u²/8 so, s = (u²/8)/(u²/8) = 1kmoption 1.

,body moving with uniform retardation covers 3 km before its speed is reduced to half of its initial value. It(2) A is moving with increasing speedmoving with non-zero constant acceleration (4) Acceleration of A may be constantcomes to rest in another distance of(1) 1 km(3) 3 km(2) 2 km(4) kmash Educational Services

Answer»

let the initial velocity be u , and retardation is a.so, when velocity is u/2

distance covered is 3kmusing V² = u²-2as => (u/2)² = u² -2a(3)=> 6a = 3u²/4 => a = u²/8

so , now when V = 0the 0 = (u/2)² -2a(s)=> s = u²/8a

but a = u²/8

so, s = (u²/8)/(u²/8) = 1kmoption 1.

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