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3 years ago

what is the difference in gravitation potential energy when a 3.5 of box is raised from a height of 1.2m to a height of 4.0m?

Physics

1 answer:

mario62 [17]3 years ago

6 0

Answer: 96.138 J

Explanation:

Use equation for potential gravitational energy : Ep=mGh

Ep1=mGh1

Ep2=mGh2

-------------

Ep1= 3.5*9.81*1.2

Ep1=41.202 J

Ep2=3.5*9.81*4

Ep2=137.34 J

Ep=Ep2-Ep1

Ep=137.34-41.202

Ep= 96.138 J

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3 years ago

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3 years ago

A current of 0.92 a flows in a wire. how many electrons are flowing past any point in the wire per second? the charge on one ele

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3 years ago

Two obiect accumulated a charge of

tamaranim1 [39]

Answer:

A. 181.24 N

Explanation:

The magnitude of hte electrostatic force between two charged objects is given by the equation

$F=k\frac{q_1 q_2}{r^2}$

where

k is the Coulomb's constant

q1, q2 are the magnitudes of the two charges

r is the separation between the charges

In this problem, we have:

$q_1=4.5\mu C=4.5\cdot 10^{-6}C$ is the magnitude of the 1st charge

$q_2=2.8\mu C=2.8\cdot 10^{-6}C$ is the magnitude of the 2nd charge

r = 2.5 cm = 0.025 m is the separation between the charges

Therefore, the magnitude of the electric force is:

$F=\frac{(9\cdot 10^9)(4.5\cdot 10^{-6})(2.8\cdot 10^{-6})}{(0.025)^2}=181.44 N$

So, the closest answer is

A) 181.24 N

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4 years ago

You are directed to set up an experiment in which you drop, from shoulder height, objects with similar surface areas but differe

tangare [24]

Answer: c. they will hit the ground at the same time

Explanation:

The volume of both objects is almost the same, so the force of friction will be the same in each one, so we can discard it.

Now, when yo drop an object, the acceleration of the object is always g = 9.8m/s^2 downwards, independent of the mass of the object.

So if you drop two objects with the same volume but different mass, because the acceleration is the same for both of them, they will hit the ground at the same time, this means that the density of the object has no impact in how much time the object needs to reach the floor.

So the correct option is c

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3 years ago

what is the difference in gravitation potential energy when a 3.5 of box is raised from a height of 1.2m to a height of 4.0m?​

what is the difference in gravitation potential energy when a 3.5 of box is raised from a height of 1.2m to a height of 4.0m?