a running man has half the kinetic energy that a boy?
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A running man has half the kinetic energy of that of a boy of half of his mass. The man speed up 1m/s, so as the have same kinetic energy as that of a boy.
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The body with half the velocity would have one quarter the kinetic energy. this can be derived from the formula for kinetic energy. since all is equal but the velocity, and the velocity is squared, then the ratio of the kinetic energies is the ratio of the velocities squared.
975887
The kinetic energy of an object depends on both its mass and velocity, with its velocity playing a much greater role. Examples of Kinetic Energy: ... A baseball thrown by a pitcher, although having a small mass, can have a large amount of kinetic energy due to its fast velocity.
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Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 kg that is traveling horizontally at 11.3 m/s. Olaf's mass is 75.0 kg.
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The kinetic energy attained by the object of mass 1kg at 1m/s is 0.5joules. Thus, 0.5 J is the energy required by the mass to move at 1m/d considering there is no loss in conversion of energy from one form to another.
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The kinetic energy is given by KE = 1/2 mv2. This can be found by analyzing the force on the electron.
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1. You'll burn roughly 400 to 600 calories per hour during your run, but your body can absorb only 240 to 280 calories per hour. You'll never dig out of this deficit, but eating early and often will keep you from bonking.
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Male athletes have a higher ratio of muscle mass to body weight, which allows for greater speed and acceleration. This explains why female speed records in running and swimming are consistently 10 percent slower than men's, and why, on average, they have two thirds of the strength of men.
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Power is the rate of doing work. For example, if the runner in the picture commits 5 Joules of total mechanical work per kilogram every second, power = 5 Watts/kg (1 W = 1 Joule/second). A cycle of running motion from touchdown to touchdown of the same leg is called the stride.
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It depends on your weight only and is directly proportional to your weight. If you double your weight, you double the calories burned per distance. A common rule of thumb used by runners is 100 calories per mile for a typical female or 100 calories per km for a male.
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Tall people don't necessarily fun faster than shorter people. In the battle of tall runners vs. short runners, with all things being equal — body mass, flexibility, proportionality and stride rate — taller people can run faster than shorter people. However, the mechanics of running depends upon more than runner height.
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The idea of converting human body heat into a form of usable energy has been targeted by scientists for years. A resting human male gives off roughly 100-120 Watts of energy.
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Speed relates to Kinetic Energy. While Power is measured in force or Joules.
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The acceleration of the ball is 83.333ms2[forward] . Now that may seem like a lot, and that's because you are applying a lot of force to a relatively small (and lightweight) object.
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The Flash. So no, Barry Allen isn't the fastest man alive, Wally West is.
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When considering human-powered equipment, a healthy human can produce about 1.2 hp (0.89 kW) briefly (see orders of magnitude) and sustain about 0.1 hp (0.075 kW) indefinitely; trained athletes can manage up to about 2.5 hp (1.9 kW) briefly and 0.35 hp (0.26 kW) for a period of several hours.
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KE = 1/2 * m * v^2 and p = mv. We can manipulate the KE formula to show where momentum is in it. In words we can say that the kinetic energy of a body is equal to the product of its momentum and one-half of its velocity.