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3 years ago

Which force operates at the distance 1 m?

Physics

1 answer:

Dmitrij [34]3 years ago

4 0

Hi,

The answer is D, Gravitational.

Hope this helps.
r3t40

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2 years ago

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klio [65]

If,

$d \: = \: \frac{1}{2} a {t}^{2}$

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7 0

2 years ago

A machine

In-s [12.5K]

Answer:

Power_input = 85.71 [W]

Explanation:

To be able to solve this problem we must first find the work done. Work is defined as the product of force by distance.

$W = F*d$

where:

W = work [J] (units of Joules)

F = force [N] (units of Newton)

d = distance [m]

We need to bear in mind that the force can be calculated by multiplying the mass by the gravity acceleration.

Now replacing:

$W = (80*10)*3\\W = 2400 [J]$

Power is defined as the work done over a certain time. In this way by means of the following formula, we can calculate the required power.

$P=\frac{W}{t}$

where:

P = power [W] (units of watts)

W = work [J]

t = time = 40 [s]

$P = 2400/40\\P = 60 [W]$

The calculated power is the required power. Now as we have the efficiency of the machine, we can calculate the power that is introduced, to be able to do that work.

$Effic=0.7\\Effic=P_{required}/P_{introduced}\\P_{introduced}=60/0.7\\P_{introduced}=85.71[W]$

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2 years ago

How is energy transferred between two objects at different temperatures?

mojhsa [17]

When calculated energy transferred between objects use the definition of heat as

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2 years ago