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2 years ago

Question 3

Physics

1 answer:

Yuki888 [10]2 years ago

4 0

Answer:

$Power = 2.5kW$

Explanation:

Given

$Mass = 200kg$ -- mass of tub

$Energy = 200,000J$

$Time = 80s$

Required

Determine the amount of power needed

Power is calculated as thus:

$Power = \frac{Energy}{Time}$

Substitute values for Energy and Time

$Power = \frac{200,000J}{80s}$

$Power = 2500W$

Divide by 1000 to convert to kW (kilowatt)

$Power = 2.5kW$

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Answer:

Work done = 35467.278 J

Explanation:

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3 years ago

Daffy Duck is standing 6.8 m away from Minnie Duck. The attractive gravitational force between them is 5.4x10-8 N. If Daffy Duck

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Answer:

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Explanation:

From the question given above, the following data were obtained:

Distance apart (r) = 6.8 m

Force of attraction (F) = 5.4×10¯⁸ N

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Mass of Minnie Duck (M₂) =?

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The mass of Minnie Duck can be obtained as follow:

F = GM₁M₂ / r²

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5.4×10¯⁸ = 6.67×10¯¹¹ × 86.5 × M₂ / 46.24

Cross multiply

6.67×10¯¹¹ × 86.5 × M₂ =5.4×10¯⁸ × 46.24

Divide both side by 6.67×10¯¹¹ × 86.5

M₂ = 5.4×10¯⁸ × 46.24 / 6.67×10¯¹¹ × 86.5

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