3 years ago

I need help answering this question.

1 answer:

6 0

The work done is the loss of kinetic energy.

Loss of kinetic energy = m*(v1^2 - v2^2)/2 = 10 kg * [ (99m/s)^2 - (1m/s)^2]/2 = 49,000 J

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A bucket of mass M (when empty) initially at rest and containing a mass of water is being pulled up a well by a rope exerting a

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Answer:

$V=\dfrac{PT}{m}\ ln\dfrac{M+m}{M}-gT$

Explanation:

Given that

Constant rate of leak =R

Mass at time T ,m=RT

At any time t

The mass = Rt

So the total mass in downward direction=(M+Rt)

Now force equation

(M+Rt) a =P- (M+Rt) g

$a=\dfrac{P}{M+Rt}-g$

We know that

$a=\dfrac{dV}{dt}$

$\dfrac{dV}{dt}=\dfrac{P}{M+Rt}-g$

$\int_{0}^{V}V=\int_0^T \left(\dfrac{P}{M+Rt}-g\right)dt$

$V=\dfrac{P}{R}\ ln\dfrac{M+RT}{M}-gT$

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This is the velocity of bucket at the instance when it become empty.

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3 years ago

1. A ball with a mass of 2.3 kg travels with a velocity of 10 m/s. What is it's kinetic energy?

monitta

Answer:

KE=½mv²

KE=½2.3kg×(10m/s)²

KE=½2.3kg×100m²/s²

KE=2.3kg×50m²/s²

KE=115joules

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2 years ago

Tech A says that a vacuum modulator converts manifold vacuum into an engine load signal. Tech B says that the manual valve is mo

alexandr1967 [171]

Answer:

The correct option for the answer is A.) Tech A

Explanation:

Tech A is correct

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3 years ago

After a teaspoon of sugar has been stirred into a glass of water, no solid sugar can be seen. What happened to the sugar?

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Answer:

B. The sugar dissolved

Explanation:

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3 years ago

Read 2 more answers

In the electromagnetic spectrum, _______ is the _______ frequency color of visible light.

Elden [556K]

In the electromagnetic spectrum, "Blue" is the "highest" <span>frequency color of visible light.

Or I</span>n the electromagnetic spectrum, "Red" is the "Lowest" frequency color of visible light.

Hope this helps!

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3 years ago