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Ludmilka [50]
3 years ago
12

A 45000 watt crane operating at full power lifts a 2100 kg object vertically for 17.4 seconds. How high has the crane lifted the

object?
Physics
1 answer:
LenKa [72]3 years ago
8 0

Answer:

Explanation:

We need the power equation here, which is:

Power = (F * Δx)/time

where F * Δx is the amount of work done.

F is a force which is measured in Newtons. We are given the mass of the object, but since we need a Force measure, we need the weight of the object:

F = 2100(9.0)

F = 21000 to the correct number of sig dig.

Now we can plug in the values we have and solve for the displacement, Δx:

45000=\frac{21000x}{17.4} and isolating x:

\frac{17.4(45000)}{21000}=x so

x = 37 m

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Neporo4naja [7]

Units of impulse: N • s, kg • meters per second

Explanation:

Impulse is defined in two ways:

1)

Impulse is defined as the product between the force exerted in a collision and the duration of the collision:

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where

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Since the force is measured in Newtons (N) and the time is measured in seconds (s), the units for the impulse are

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N • s

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Impulse is also defined as the change in momentum experienced by an object:

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Learn more about impulse:

brainly.com/question/9484203

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3 years ago
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A proton moves from a location where V = 87 V to a spot where V = -40 V. (a) What is the change in the proton's kinetic energy?
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Answer: a) 127 eV; b) there is no change of kinetic energy.

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If we replace the proton by a electron we have a very different situaction, the electrons are located in a lower potental then  they can not move to higher potential  if any  external force does work on the system.

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