Impulse also depends on how long the force is applied. More time, more impulse. Impulse is also directly proportional to the time for which the force is applied - twice as long means twice the impulse, three times as long means three times the impulse. So, the impulse exerted on an object depends directly on both how much force is applied and for how long the force is applied. Impulse is the product of the force and the time. Impulse = (force)(time) = Ft. Impulse is a vector quantity. It has the same direction as the applied force. The fact that impulse depends on both force and time means that there is more than one way to apply a large impulse to an object - you can apply a very large force for a reasonable time, or apply a regular force for a very long time (or both!).
The body mass index (BMI) or Quetelet index is a value derived from the mass (weight) and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m 2, resulting from mass in kilograms and height in metres.
Tools: Body Mass Index. B.M.I. is a reliable indicator of total body fat, which is related to the risk of life-threatening diseases. The score is valid for both men and women, but it may overestimate body fat in athletes and others who have a muscular build. It may also underestimate body fat in older people and others who have lost muscle mass.