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Pranav Gupta 6 years, 7 months ago
CGS unit of force = cm gm / sec
36 m kg / min = 36 * 100 * 1000 * 60 = 216 * 106 cm gm / sec
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Pranav Gupta 6 years, 7 months ago
Beacuse we measure other quantities by using the 7 fundamental quantities i.e., mass, length, time, luminous intensity, temperature, electric current, amount of substance.
Other quantities are derived by multiplying andd dividing these quantities.
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10x5 + 12x3 + 20x2 + 24
<hr />d/dx = 50x4 + 36x2 + 40x
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it is a quantity which is described only by its magnitude. it is always positive. sometimes it is negative but it shows that the magnitude is less.(for eg. temperature). its negative sign does not describes the opposite direction unlike vector.
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Pranav Gupta 6 years, 7 months ago
(a) differentiate the functions (1) d(x)/dt = 3m/s (2) d(x)/dt = -(4m/s2)*t (3) d(x)/dt = -(4m/s2)*t (4) d(x)/dt = 0
In (2) & (3) velocity is a function of time, so it will not be constant. But in (1) & (4) velocity is constant, although in (4) it is 0.
(b) The direction of vector depends on slope of the function. In (a) we have found slopes of these functions. (slope of x-t graph = velocity). In (2) & (3) velocity is negative so these vectors will point in negative x direction. But in (1) & (4) velocity is non-negative so it will not point in negative x direction.
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