Physics, asked by Bellesahrasah1744, 11 months ago

An object of mass 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object

Answers

Answered by AmanSirmaur
3

Answer:

p(i )=100 × 5=500 kgm/s

p(f)=100 × 8=800 kgm/s

force= change in momentum per unit time.

so plz. give some time for given change in momentum.

Answered by BrainlyRaaz
64

 \bf{\underline{\underline{Answer:}}}

 \bf{\therefore 50\:N}

 \bf{\underline {Given:}}

Initial velocity,  u \:=\:5\:{s}^{-1}

Final velocity,  v \:=\:8\:{s}^{-1}

Mass of the given object,  m = 100\:kg

Time,  t\:=\:6\:s

 \bf{\underline {To\:Find:}}

Initial momentum and final momentum =?

Magnitude of force exerted on the object =?

We know that,

Momentum, p = Mass × Velocity

Therefore, initial momentum,

= Mass × Initial velocity

 {100×5=500\:kg \:m\:{s}^{-1}}

Final momentum,

= Mass × Final velocity

 {100×8=800\:kg\:m\:{s}^{-1}}

 <b>To find the magnitude of the force exerted on the object :</b>

We know that,

 v \:= \:u \:+ \:at

 8 \:= \:5 \:+ \:a\:×\:6

 8 \:-\:5 \:= \:a\:×\:6

 a =\dfrac{3}{6}\:=\:0.5\:m\:{s}^{-2}

Now, force exerted on object

= Mass × Accleration

= 109 × 0.5

= \bf{50\:N}

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