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4 years ago

Physical fitness involves the proper functioning of which body systems?

Physics

2 answers:

leva [86]4 years ago

8 0

Respiratory
Circulatory
Muscular

tatiyna4 years ago

4 0

Answer: circulatory

respiratory

muscular

Explanation:

The physical fitness can be define as the state of well being and health. It indicates towards the ability of the organisms to perform various aspects of physical activities such as sports, daily routine work, and occupational tasks. It is achieved by moderate to vigorous physical exercises, sufficient amount of rests and proper nutrition.

The physical fitness involves the proper functioning of the vital systems of the body these includes the respiratory, circulatory and muscular. As the body performs exercise it requires more amount of oxygen also the muscles performing activity deprive of the oxygen, the rate of respiration increases, more amount of blood is pumped out by the heart to fulfill the need of oxygen.

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Is the image formed on the retina real or virtual

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It is real, however it gets inverted in the retina and flips back in the cornea

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We can compare these two interactions on the basis of impulse (see above), but sometimes, we are more interested in the forces (

kiruha [24]

Complete Question

The complete question is shown on the first uploaded image

Answer:

$I = 476 \ N \cdot s$

$I_1 = 14.21 \ N\cdot s$

$F = 20300 \ N$

Explanation:

Considering the first question

From the question we are told that

The force produced is $F = 3400 \ N$

The duration of the punch is $t = 0.14 \ s$

Generally the impulse delivered is mathematically represented as

$I = F * t$

=> $I = 3400 * 0.14$

=> $I = 476 \ N \cdot s$

Considering the second question

The approaching velocity of the ball is $v_b = 45 \ m/s$

The leaving velocity of the ball is $v_l = -53 \ m/s$

The mass of the ball is $m_b = 0.145 \ kg$

Generally the magnitude of the impulse delivered is mathematically represented as

$I_1 = m* v_b - m * v_l$

=> $I_1 = [0.145 * 45] - [0.145 * -53]$

=> $I_1 = 14.21 \ N\cdot s$

Considering the third question

The duration of the impact of the bat is $t _1 = 0.7 \ ms = 0.7 *10^{-3} \ s$

Generally the average force exerted by the bat is mathematically represented as

$F = \frac{I_1}{t_1}$

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7 0

4 years ago

Which change will always result in an increase in the gravitational force between two objects? increasing the masses of the obje

abruzzese [7]

By definition, we have that the gravitational force is given by:

$F = \frac{G * m1 * m2}{r ^ 2}$

Where,

G: gravitational constant

m1: mass of object number 1

m2: mass of object number 2

r: distance between both objects.

Therefore, for the gravitational force to increase, the following conditions must be met:

1) Increase the mass of the objects so that the numerator of the equation is greater.

2) Decrease the distance between the objects so that the denominator of the equation is smaller.

Answer:

A change that will always result in an increase in the gravitational force between two objects is:

increasing the masses of the objects and decreasing the distance between the objects

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3 years ago

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How can one object affect the motion of another without touching it?

stealth61 [152]

By non-contact forces (e.g. gravitational force and electric force)

Explanation:

In order for an object to exert a force on another object, the two object can also be not touching each other. In fact, there exist some non-contact forces in nature.

Concerning macroscopic objects, the two main non-contact forces acting between objects are:

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where

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- The electric force: this force is exerted between objects that have electric charge. It can be either attractive or repulsive, and its magnitude is given by

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

where:

$k=8.99\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the two charges

r is the separation between the two charges

Learn more aboit gravitational and electric force:

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brainly.com/question/12785992

brainly.com/question/8960054

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