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4 years ago

Find the force needed to lift a 3,000 -N weight using a machine with a mechanical advantage of 15

Physics

2 answers:

Nikolay [14]4 years ago

3 0

Answer:

We have the output force (3000) and the mechanical advantage is 15, the formula is Ma = F(o) / F(i), so 15 = 3000 / x, so x = 200 newtons!

Morgarella [4.7K]4 years ago

3 0

Answer:

Explanation:

Mechanical advantage=15

Load=3000N

Effort=?

Mechanical advantage=load➗effort

15=3000 ➗ effort

Cross product

15 x effort=3000

effort=3000 ➗ 15

Effort=200N

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If the density of the fuel is 0.821 g/ml, what mass of fuel has the airplane taken on?

bija089 [108]

<em>Mass of fuel has the airplane took on = 167.89 kg</em>

$\boxed{\boxed{\bold{Further~explanation}}}$

Density is a quantity derived from the mass and volume

density is the ratio of mass per unit volume

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of mass

The unit of density can be expressed in g / cm3 or kg / m3

Density formula:

$\large{\boxed{\bold{\rho~=~\frac{m}{V} }}}$

ρ = density

m = mass

v = volume

A common example is the water density of 1 gr / cm3

If we look at fuel capacity data such as Airbus which has a maximum capacity of 204, 5 liters then the mass of fuel it carries is

ρ = 0.821 gr / ml = 0.821 kg / l

mass = ρ . V

mass = 0.821 kg / l . 204.5 liters

mass = 167.89 kg

So the mass of fuel carried by aircraft is 167.89 kg

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Keywords: density, mass, volume, aircraft, fuel, derivative quantities

7 0

4 years ago

Read 2 more answers

A force of 1 N is the only horizontal force exerted on a block, and the horizontal acceleration of the block is

SVEN [57.7K]

The mass of the first block will be three times the mass of the second block.

According to Newton's second law of motion, the force acting on a body is directly proportional to the acceleration as shown;

$F\ \alpha \ a$

$F = ma$

F is the acting force

m is the mass

a is the acceleration of the body

Given the following parameters

Constant force F = 1N

For the first block with the acceleration of "a"

1 = m₁a

a = m₁/1

m₁ = a .................1

For the second block, acceleration is thrice that of the first. This means;

F = m(3a)

1 = 3ma

$m_2=\frac{1}{3a}$ ..........................2

Divide both equations

$\frac{m_1}{m_2} =\frac{a}{(\frac{1}{3a} )}\\\frac{m_1}{m_2} = 3\\m_1 = 3m_2$

From the calculation, we can conclude that the mass of the first block will be three times the mass of the second block.

Learn more here: brainly.com/question/19030143

4 0

3 years ago

An electric motor exerts a constant torque of 10 Nm on a grindstone mounted on its shaft. The moment of inertia of the grindston

Dmitry_Shevchenko [17]

Answer:

Angular acceleration = 5 rad /s ^2

Kinetic energy = 0.391 J

Work done = 0.391 J

P =6.25 W

Explanation:

The torque is given as moment of inertia × angular acceleration

angular acceleration = torque/ moment of inertia

= 10/2= 5 rad/ s^2

The kinetic energy is = 1/2 Iw^2

w = angular acceleration/time

=5/8= 0.625 rad /s

1/2 × 2× 0.625^2

=0.391 J

The work done is equal to the kinetic energy of the motor at this time

W= 0.391 J

The average power is = torque × angular speed

= 10× 0.625

P = 6.25 W

6 0

4 years ago

You are a psychic when you tap into your other__% of your brain.

vladimir1956 [14]

20% would be probably right cuz 100% is total and 80+ what gives u 100 which is 20

4 0

3 years ago

Five-gram samples of copper and aluminum are at room temperature. Both receive equal amounts of energy due to heat flow. The spe

laila [671]

m₁ = mass of sample of copper = m₂ = mass of sample of aluminum = 5 g

T = initial temperature of copper = initial temperature of aluminum

T₁ = final temperature of copper

T₂ = final temperature of aluminum

c₁ = specific heat of copper = 0.09 cal/g°C

c₂ = specific heat of aluminum = 0.22 cal/g°C

Since both receive same amount of heat, hence

Q₁ = Q₂

m₁ c₁ (T₁ - T) = m₂ c₂ (T₂ - T)

(5) (0.09) (T₁ - T) = (5) (0.22) (T₂ - T)

T₁ - T = (2.44) (T₂ - T)

Change in temperature of copper = (2.44) change in temperature of aluminum

hence the correct choice is

c. The copper will get hotter than the aluminum.

4 0

3 years ago

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