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3 years ago

What is the force on a 1,000 kilogram-elevator that is falling freely under the acceleration of gravity only?

1 answer:

8 0

   Force = (mass) · (acceleration)

   = (1,000 kg) · (9.8 m/s²)

   = 9,800 newtons

Why are you still having a problem with F = M · a ?

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3. Four charges having charge q are placed at the corners of a square with sides of length L. What is the magnitude of the force

AveGali [126]

Answer:

Fr = 1.91 * 9*10⁹*q²/L²

Explanation:

Let´s say that the corners of the square are A B C and D

We are going to find out the force on the charge placed on B ( the charge placed in the upper right corner.

As all the charges are positive (the same sign), then all the three forces on the charge in B are of rejection.

Force due to charge placed in A

module Fₓ = K* q² / L² in the direction of x

Force due to charge placed in C

module Fy = K* q²/L² in the direction of y

Force due to the charge placed in D

That force will have the direction of the diagonal of the square, and the distance between charges placed in D and A is the length of the diagonal.

d² = L² + L² = 2*L²

d = √2 * L

The module of the force due to charge place in D

F₄₅ = K*q²/ 2*L²

To get the force we need to add first Fₓ and Fy

Fx + Fy = F₁

module of F₁ = √ Fx² + Fy² the direction will be the same as the diagonal of the square then:

F₁ = √ ( K* q²/L² )² + ( K* q²/L² )²

F₁ = √ 2 * K*q²/L²

And now we add forces F₁ and F₄₅ to get the net force Fr on charge in point B.

The direction of Fr is the direction of the diagonal and is of rejection

the module is

Fr = F₁ * F₄₅

Fr = √ 2 * K*q²/L² + K*q²/ 2*L²

Fr = ( √ 2 + 0,5 ) * K*q² /L²

K = 9*10⁹ Nm²C²

Fr = 1.91 * 9*10⁹*q²/L²

We don´t know units of L and q

6 0

2 years ago

My trip to work is 120 miles. if i go 8 mph faster than my usual speed, i'll get to work 30 minutes earlier. how long does my tr

forsale [732]

Let x be the time it takes for the trip to be completed given that the speed is y.

When the time is 30 minutes (equal to 0.5 hour) shorter than x, the speed is 8 mph more than the original speed.

The equations that would best represent the given conditions are:
(1) 120 = (x)(y)
(2) 120 = (x - 0.5)(y + 8)

Simplifying,
y = 120/x
Substitute:
120 = (x - 0.5)(120/x + 8)

The value of x from the equation is 3. Thus, if I go with the usual speed, the time it will take me to finish the trip is approximately 3 hours.

7 0

3 years ago

Read 2 more answers

Tritium, the 3H atom, consists of a nucleus of one proton and two neutrons with a single electron. It is unstable and decays via

nika2105 [10]

Answer: hello your question is poorly written attached below is the complete question

P( ³₂He₊ ) at ground state = 1

Explanation:

<u>Determine the probability that the 3He atom is in its ground state after decay</u>

From the attached solution the coulomb interaction of ( ³₂He) is double that of H³ . given that coulomb interaction is attractive ( -ve ) this will make the product to become more stable hence the product ( ³₂He₊ ) will be gotten at the ground state

i.e. P( ³₂He₊ ) at ground state = 1

attached below is a detailed solution

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3 years ago

Two different sub-atomic particles are described below: Particle Y: Carries a positive charge Particle Z: Orbits the nucleus Whi

torisob [31]

Y is a proton and z is an electron. Protons and neutrons are in the nucleus.

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3 years ago

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What is KiloWatt unit in simple words??<br> Explain.......

lbvjy [14]

Answer:

A kilowatt (kW) is 1000 watts. A watt-hour (Wh) is a unit that measures the amount of electrical energy used over a period of time. A kilowatt hour (kWh) is 1000 watt-hours. A kilowatt is a unit of energy that carries a lot of significance in everyday life — it's the base unit used in the routine measurement for electrical energy. All the appliances and gadgets in your home consume electricity measured in kilowatts.

<h2>Please mark me as brainliest</h2>

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3 years ago