3 years ago

Based on the wall of conservation of energy how can we reasonably improve a machines ability to do work?

Physics

1 answer:

Margaret [11]3 years ago

8 0

we can reduce the friction between its moving parts.

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Answer:

the same

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2 years ago

A person in a kayak starts paddling, and it accelerates from 0 to 0.680 m/s in a distance of 0.428 m. If the combined mass of th

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Answer:

Net force, F = 44.66 N

Explanation:

It is given by,

Initial velocity of the person, u = 0

Final velocity of the person, v = 0.68 m/s

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We need to find the net force acting on the kayak i.e.

F = ma...........(1)

Firstly, we will calculate the value of "a" from third equation of motion as :

$v^2-u^2=2as$

$a=\dfrac{v^2-u^2}{2s}$

$a=\dfrac{(0.68\ m/s)^2-0}{2\times 0.428\ m}$

$a=0.54\ m/s^2$

Put the value of a in equation (1) as :

$F=82.7\ kg\times 0.54\ m/s^2$

F = 44.66 N

So, the net force acting on the kayak is 44.66 N. Hence, this is the required solution.

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3 years ago

Explain how a hydroelectric power plant converts energy stored in water into electricity

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Ingrid is jogging at 9 km/h, she tosses a relay stick at 16 km/h to her teammate. How fast is the relay stick moving relative to

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27km/h

Explanation:

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3 years ago

A _____ tide occurs when the ocean's surface reaches its maximum height in a particular place on any particular day.

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In one of the startling coincidences sprinkled throughout
every field of math and science, the moment of maximum
height is popularly referred to as the "high" tide.

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3 years ago

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