According to the question, the wall will also give you n Newton force as an opposite reaction. You all know that according to Newton’s third law every action has the opposite reaction. So what will be the magnitude of the normal force through the wall? Suppose you apply n Newton force on a wall. And here the magnitude of relative velocity is 140 m/s.Ģ. In this case n is the unit vector towards the trajectory of the other train. That is, your respect will be the velocity of the other train In this case, the concept of relative velocity will come. And then when you are asked what was the velocity of your respect other train? But when you look at that train, the train goes out of your side at a very fast speed. And another train is coming from the opposite direction with a real velocity of 60 m/s. Suppose you are sitting in a moving train with a velocity of 80 m/s. To determine the magnitude of a vector quantity, you have to follow the rules of vector algebra.ġ. Vectors will not follow the rules of general algebra. So, calculate the scalar’s magnitude in this simple way. And in this case, your total bill will be 12 dollars. You bought a dozen bananas from a fruit shop for one dollar per banana. In this case, the calculation of magnitude has followed the rule of simple addition.ģ. Then now your total amount of milk will be 1250 ml. Suppose you mix 250 ml of water in one liter of pure milk. In this case, 346 km is the magnitude of the distance.Ģ. When you arrived in Boston, a friend of yours asked you, “How much distance did you travel in total?”Īnd when you tell your friend I have traveled 346 km. Suppose you take a bus journey from New York to Boston. We calculate scalar magnitude 90 percent of the time in real life. Scalar magnitude calculation is very simple which we do every day. Here are some real-life examples to help you understand. So, you noticed that different algebraic rules have to flow to define the magnitude of both types of physical quantities. Because you have to follow the rules of vector algebra in this case. When you calculate the magnitude of a vector, you don’t have to follow the linear algebra rules. And when defining a vector, you should not just write magnitude, you should also specify the direction. For example, velocity, displacement, force, etc. Vectors are those physical quantities whose magnitude and directions are both presents. And to define scalar quantity, you need to know magnitude and unit.Īnd in the case of scalar, to calculate magnitude, you have to follow the linear algebraic rule. For example, mass, temperature, density, volume, etc. Scalar QuantityĪ scalar is a physical quantity that has only magnitude. And both quantities follow different algebraic rules. Because physical quantity is of two types scalar and vector. However, the magnitude of each physical quantity cannot be determined in the same way. So, every physical quantity has magnitude. #Magnitude physics calculator how toHow to Calculate Magnitude of a Physical Quantity?Ī physical quantity is a measure. Since magnitude refers to numbers, the magnitude can be positive, negative, and float.
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