Gravitational force = G M₁ M₂ / R²
' G ' is 6.673 x 10⁻¹¹ m³ / kg - s²
In this particular problem,
M₁ is the mass of the Earth = 5.972 x 10²⁴ kg
M₂ is the mass of the wrestler = 1500 kg
' R ' is the distance between their centers. That's the radius of the Earth = 6,371 x 10³ meters
You can stuff all these numbers into the formula for gravitational force, like we did with the 60kg student and the 120kg door.
Or you can just say to yourself: "Self ! This problem is just looking for the wrestler's 'weight'. We know that's just (mass) x (acceleration of gravity). On Earth, the acceleration of gravity is 9.8 m/s². All I have to do is multiply that by his mass of 1500 kg and the answer will be his weight in Newtons."
When you do that, you get
Weight = (9.8 m/s²) x (1500 kg)
<em>Weight = 14,700 Newtons</em> (about 3,307 pounds !)
What happened here ? ? I know he's a Sumo wrestler and all, and they really like to eat. But 3,307 pounds ? ? ?
What happened is the "1500 kg". That can't be correct for a human being. It's more like a small elephant.
I'm pretty sure you mis-copied the problem, and his mass is actually 150kg.
Answer:
Iron deficiency
Explanation:
or more scientifically explained as decreased hemoglobin levels in your blood but still caused by lack of iron.
Musculoskeletal
You use your musculoskeletal system extensively during exercise. Muscle fibers contract to shorten muscles in such a way that pivots bones around joints, resulting in the swinging arms and running legs of exercise. When you exercise, your muscles need more oxygen-rich blood and glucose. Your body must shift resources away from some body systems to meet this demand.
Nervous
Your nervous system plays an important role in exercise, predicting the level of activity and then routing resources to those body systems used during exercise. Your central nervous system increases your heart rate early on in exercise. Your nervous system also signals your muscles to take up more oxygen from the bloodstream, known as oxygen uptake.
Heart
Your cardiovascular system includes your blood vessels and your heart, which pumps blood to the rest of your body through those blood vessels. Cardiac output is the amount of blood your heart pumps. According an article published in Clinics in Sports Medicine, the typical person at rest has a cardiac output of five to six liters per minute. Your cardiac output must satisfy the metabolic needs of the body during exercise by providing the body with the oxygen-rich blood it needs to perform the physical activity. Your heart rises to the challenge by increasing the force at which it pushes blood through your blood vessels. Stroke volume, or the amount of blood pumped by one portion of the heart, increases by 30 to 40 percent when you go from a resting state to peak exercise.
Circulatory System
Your body must manage blood flow to meet the demand of active muscles while still supplying other vital organs the blood they need to function. During exercise, blood flow to your brain remains relatively constant while blood flow to your kidneys and spleen is cut in half. Blood flow to the muscles of your heart increases by four times during exercise and your body increases blood flow to your skeletal muscles by about ten times during physical activity. Scientists call this increase in blood flow to the cardiovascular and skeletal muscles exercise hyperemia. You experience vasodilatation and decreased vascular resistance when you exercise, which means your blood vessels expand to allow blood to flow more efficiently. Your systolic pressure, or the top number on a blood pressure reading, rises while your diastolic pressure falls.
Respiratory
Increased muscle activity calls on the lungs to produce more oxygen to muscle cells and to remove excess carbon dioxide from the body. There is a linear relationship between cardiac output and oxygen uptake – the more blood your heart pumps, the more oxygen your muscles take from the bloodstream. Exercise causes your respiratory rate to increase four to five times over your resting rate. Tidal volume, or the amount of air you inhale and exhale in a single breath, increases five to seven times.
Endocrine
Your endocrine stimulates certain responses around the body through the use of hormones which act like chemical messengers. Insulin, a hormone, stimulates muscles into taking up glucose from the bloodstream, which the muscles use for energy. Your endocrine system releases other hormones during exercise, such as thyroxine which speeds up metabolism and epinephrine. Epinephrine is beneficial to your cardiovascular system, according to Western Michigan University.
Your entire body gets involved when you exercise, even if that physical activity involves only one or two body parts. Understanding the body systems used during exercise helps you optimize your workouts.
Answer:
Explanation:
In physics, work can be described as force multiplied by the displacement of the object (distance caused by the force acted on the object).
Work is a form of energy, therefore, it is measured in joules.
If Alex pushed on an object with 10N of force, and the object moved 2 meters, the work of Alex will be equal to:
W = Ft
W = 10N * 2m
W = 20 Joules
But, if we have John, that pushed on an object with 2N of force, but, since the object was way smaller, therefore it had way less inertia, the object moved a distance equal to 10 meters. Let's also calculate his work.
W = Ft
W = 2N * 10m
W = 20 Joules
And we got the same result.
Work can also be used to calculate power.
Power is equal to P = Work / time
It can also be written as P = delta Work / delta time
Power is measured in joules per second.
With power you can make the difference between someone that got a 2 kg object up in 2 second, and someone that got a 2 kg object up in 5 second.
The more powerful one would be the one who managed to make the same work in less time.
Hope it Helped!
Answer:
Rain and snow are the main types, sleet or hail are less common, but possible.
Explanation: