The strength of gravity is the value for which the body is attracted to the ground under the action of its attraction. This indicator directly depends on the weight of the person or the mass of the subject. The more weight, the higher. In this article we will tell you how to find gravity.
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From the school year of physics: the strength of attraction is directly proportional to the weight of the body. Calculate the value according to the formula F \u003d M * G, where G is a coefficient equal to 9.8 m / s 2. Accordingly, for a person who weighs 100 kg, the strength of attraction is 980. It is worth noting that in practice everything is a little different, and many factors affect gravity.
Factors affecting gravity:
distance from the ground;
geographical location of the body;
times of Day.
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Remember that in the North Pole, the permanent G is not equal to 9.8, but 9.83. This is possible due to the presence of mineral deposits in the land, which have magnetic properties. The coefficient in places of iron ore increases slightly. At the equator, the coefficient is 9.78.
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If the body is not on earth or in motion, then to determine the force of attraction you need to know the acceleration of the subject. To do this, you can take advantage of special devices - stopwatch, speedometer or accelerometer. To calculate the acceleration, determine the final and initial speed of the object movement. Take the initial speed from the ultimate magnitude, and divide the difference from the difference for a time for which the subject has passed the distance.
4
You can calculate acceleration by faving the subject. To do this, you need to move the body from the rest of the rest. Now the distance multiply by two. The resulting value is divided by the time erected into the square. This method of calculating the acceleration is suitable if the body is first at rest.
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If there is a speedometer, then to determine the acceleration, it is necessary to build the initial and final body velocity to the square. Find the difference in the squares of the final and initial speeds. The result is divided by time multiplied by 2. If the body moves around the circumference, then it has its acceleration, even at a constant speed. To find acceleration, tie the body speed into the square and divide into the radius of the circle along which it moves. Radius must be indicated in meters.
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To determine the instant acceleration, use the accelerometer. If you received a negative value of acceleration, it means that the subject is inhibits, that is, its speed is reduced. Accordingly, with a positive value, the subject is accelerated, and its speed increases. Remember, the coefficient 9.8 can only be used if the strength of gravity is determined for the subject that is on Earth. If the body is installed on the support, the support resistance should be taken into account. This value depends on the material from which the support is made.
If the body is not in a horizontal direction, then it is worthwhile to take into account the angle to which the object from the horizon is rejected. As a result, the formula will have the following form: F \u003d M * G - FLATES * SIN. The strength of gravity in Newton is measured. For calculations, use the speed measured in m / s. To do this, share the speed as km / h by 3.6.
F / M \u003d S / TT. A \u003d S / TT. A \u003d V average / t. a \u003d f / m. A \u003d AT / T. With the free fall of S / TT always \u003d number 4.9 .. This is the "Acceleration of Free Fall". (S \u003d 2156 m) t \u003d? Solution: 2156 / 4.9 \u003d TT. T \u003d 20.9 seconds. The bullet flew vertically up ... 24 sec. H \u003d? Solution: S \u003d 4.9 * 24 * 24. S \u003d 2822 m. Knowing the weight of the bullet and the efficiency of the shot can be calculated power.
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2075
F / M \u003d S / TT. A \u003d S / TT. A \u003d V average / t. a \u003d f / m. A \u003d AT / T.
With the free fall of S / TT always \u003d number 4.9 ..
This is the "Acceleration of Free Fall". (S \u003d 2156 m) t \u003d? Solution: 2156 / 4.9 \u003d TT. T \u003d 20.9 seconds.
The bullet flew vertically up ... 24 sec. H \u003d?
Solution: S \u003d 4.9 * 24 * 24. S \u003d 2822 m.
Knowing the weight of the bullet and the efficiency of the shot can be calculated power.