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solniwko [45]
3 years ago
12

Which two body systems work together closely to produce movement in human limbs

Physics
2 answers:
MArishka [77]3 years ago
5 0
Muscular and skeletal
balu736 [363]3 years ago
4 0
Muscular and skeletal , muscular works muscles and sketetal works mind and etc .
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A 320-g ball and a 400-g ball are attached to the two ends of a string that goes over a pulley with a radius of 8.7 cm. Because
Gnom [1K]

To solve this problem, it is necessary to apply the concepts related to force described in Newton's second law, so that

F = ma

Where,

m = mass

a = Acceleration (Gravitational acceleration when there is action over the object of the earth)

Torque, as we know, is the force applied at a certain distance, that is,

\tau = F*d

Where

F= Force

d = Distance

Our values are given as,

m_1 = 0.32Kg

m_2 = 0.4Kg

d = 8.7*10^{-2}m

Since the system is in equilibrium the difference of the torques is the result of the total Torque applied, that is to say

\tau = T_2-T_1

\tau = F_2*d-F_1*d

\tau = m_2g*d-m_1*g*d

\tau = (m_2-m_1)g*d

\tau = (0.4-0.32)(9.8)(8.7*10^{-2})

\tau = 0.068N\cdot m

Therefore the magnitude of the frictional torque at the axle of the pulley if the system remains at rest when the balls are released is \tau = 0.068N\cdot m

8 0
3 years ago
A mini rubric's cube has a with of 3cm. if the cube weighs 6grams calculate its density
juin [17]

Answer:

the density is 2

Explanation:

p= m/v

p is density

m is mass

v is volume

6/3 = 2

5 0
3 years ago
A jet aircraft with mass of 658,055 kilograms is flying straight downward. At an instant the plane's engine is producing an down
sdas [7]

Answer:

The acceleration of the plane is 10.93 m/s² at that instant.

Explanation:

Given:

Mass of aircraft, m=658055\textrm{ kg}

Downward thrust produced, F=1484732.5\textrm{ N}

Upward resistance force by air, F_{R}=740492.6\textrm{ N}

Weight of the aircraft acting donward, W=mg=658055\times 9.8=6448939\textrm{ N}

According to Newton's second law, net force acting on an object is equal to the product of mass and its acceleration.

Here, the net force is given as the difference of downward forces and upward forces.

F_{net}= F+W-F_{R}\\ F_{net}=1484732.5+6448939-740492.6=7193178.9\textrm{ N}

Now,

F_{net}=ma\\7193178.9=658055a\\a=\frac{7193178.9}{658055}=10.93\textrm{ }m/s^{2}

Therefore, the acceleration of the plane is 10.93 m/s² at that instant.

3 0
4 years ago
On the kelvin scale what is the freezing point of water
Alla [95]
Freezing point of the water is known as 273 K

Hope this helps!
8 0
3 years ago
A baseball has a mass of 145 g. A pitcher throws the baseball so that it accelerates at a rate of 80 m/s2 How much force did the
Katena32 [7]

Answer:

<h2>11.6 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

mass is in kg

1000 g = 1 kg

145 g = 0.145 kg

From the question we have

force = 0.145 × 80

We have the final answer as

<h3>11.6 N</h3>

Hope this helps you

6 0
3 years ago
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