Physics, asked by sharanyalanka7, 2 months ago

The power of lifting a stone of mass 10kg and specific gravity 3 from the bed of a lake to height of 6m in water in 9.8s is __ ×10w.

need solution for this!​

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Answers

Answered by Sniki
0

Explanation:

Formula for potential energy:

The formula for potential energy depends on the force acting on the two objects. m×g×h.

The Potential Energy comes under Work Done.

Mass = 10kg

Gravity = 3nm^2÷kg^2 from bed

Height = 6m

Therefore the Work Done = m×g×h

= 10×3×6

= 180

Therefore the answer is 180 joules.

Answered by assingh
19

Topic :-

Work, Power and Energy

Given :-

A stone of mass 10kg and specific gravity 3 is raised from the bed of a lake to height of 6m in water in 9.8s.

To Find :-

Power exerted in performing given statements.

Formulae Used :-

Loss\:of\:mass\:in\:water=\dfrac{Mass}{Specific \:Gravity}

Power=\dfrac{Work\:done}{t}=\dfrac{Force \times Height\:Displaced}{t}

Solution :-

Calculating loss of mass in water,

Specific Gravity = 3

Mass = 10 kg

Loss\:of\:weight\:in\:water=\dfrac{10}{3}

Mass of stone in water = Original Mass - Lost Mass

Mass of stone in water = 10-\dfrac{10}{3}

Mass of stone in water = \dfrac{20}{3}kg

Force = Mg

Force=\dfrac{20}{3} \times 9.8 \: N

Work Done = Force × Height Displaced

Height displaced = 6 metres

Work\:Done=\dfrac{20}{3} \times 9.8 \times 6\: J

Time = 9.8 seconds

Power=\dfrac{\dfrac{20}{3} \times 9.8 \times 6}{9.8}\: W

Power = 20 × 2 W

Power = 4 × 10 W

Answer :-

So, value of blank is 4.

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