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Kinetic energy is important for long jumpers because it helps them generate the speed and power needed to take off from the board and propel themselves through the air. By converting their running speed into kinetic energy, long jumpers can maximize their jump distance. The greater the kinetic energy they can build up, the more potential energy they have to turn into distance during the jump.
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What is the physics behind the long jump?
The long jumper builds up kinetic energy with the run-up. This is chemical energy in the muscles being converted to kinetic energy, At the point of take off, he or she creates an impulse by kicking against the take-off board. The reaction to that impulse gives the jumper an upward velocity while inertia gives the jumper forward velocity.Once launched, the jumper is affected by gravity and, to a much lesser extent, aerodynamic drag. These determine the distance jumped.
Is a water fall an example of kinetic energy?
Kinetic Energy = 1/2 Mass * Velocity squared KE = (1/2)mV2 Your stream has mass and, if running, has velocity. So, this would be an example of generated kinetic energy.
Do particles of an object have kinetic energy at the freezing point?
Yes, particles of an object still have kinetic energy at the freezing point. As long as the temperature is above absolute zero, the particles will have some kinetic energy associated with their motion.
What is the kinetic energy of a 50 newton object resting on the edge of a cliff 30 meters high before it fell?
The kinetic energy of the object when it is still at rest on the edge of the cliff is zero because it has no motion. Kinetic energy is the energy possessed by an object due to its motion, so as long as the object is stationary, it has no kinetic energy.
If a force of 600N had acted over the same distance what would have been the gain in kinetic energy?
Work = Force * Distance Work = Change in Kinetic Energy Symbolically: W = Fd = ΔK Now, since the change in kinetic energy is an interval, then: ΔK = (K_final) - (K_initial) This difference indicates the gain or loss. As such, merely multiply 600N by the distance it travels through.
What is the physics behind the long jump?
The long jumper builds up kinetic energy with the run-up. This is chemical energy in the muscles being converted to kinetic energy, At the point of take off, he or she creates an impulse by kicking against the take-off board. The reaction to that impulse gives the jumper an upward velocity while inertia gives the jumper forward velocity.Once launched, the jumper is affected by gravity and, to a much lesser extent, aerodynamic drag. These determine the distance jumped.
When was kinetic energy discovered?
People have had an intuitive understanding of kinetic energy for at least as long as there have been people.
Is a water fall an example of kinetic energy?
Kinetic Energy = 1/2 Mass * Velocity squared KE = (1/2)mV2 Your stream has mass and, if running, has velocity. So, this would be an example of generated kinetic energy.
The moment a ski jumper lands has all of his potential energy been changed to kinetic energy?
No, not all of the potential energy has been changed to kinetic energy. Some of the potential energy will be dissipated as heat due to air resistance and friction between the skis and the snow upon landing.
How long has man used kinetic energy?
100 years
Do particles of an object have kinetic energy at the freezing point?
Yes, particles of an object still have kinetic energy at the freezing point. As long as the temperature is above absolute zero, the particles will have some kinetic energy associated with their motion.
What is the kinetic energy of a 50 newton object resting on the edge of a cliff 30 meters high before it fell?
The kinetic energy of the object when it is still at rest on the edge of the cliff is zero because it has no motion. Kinetic energy is the energy possessed by an object due to its motion, so as long as the object is stationary, it has no kinetic energy.
If a force of 600N had acted over the same distance what would have been the gain in kinetic energy?
Work = Force * Distance Work = Change in Kinetic Energy Symbolically: W = Fd = ΔK Now, since the change in kinetic energy is an interval, then: ΔK = (K_final) - (K_initial) This difference indicates the gain or loss. As such, merely multiply 600N by the distance it travels through.
Why is kinetic energy conserved in elastic collisions?
In elastic collisions, kinetic energy is conserved because the total energy of the system remains constant. This means that the initial kinetic energy of the objects involved in the collision is equal to the final kinetic energy after the collision. This conservation of energy principle holds true as long as no external forces, such as friction or air resistance, are present to dissipate the energy.
When a pendulum swings does it conserve energy?
Yes, a swinging pendulum will conserve its total mechanical energy (potential and kinetic energy combined) as long as there is no external force acting on it. This means that the sum of its kinetic and potential energy will remain constant throughout its motion.
What is the sum of kinetic energy and potential energy in a closed system?
In a closed system, the sum of kinetic energy and potential energy remains constant, according to the conservation of energy principle. This means that the total mechanical energy (kinetic energy + potential energy) of the system is conserved and does not change over time as long as there are no external forces doing work on the system.
How does the conservation of kinetic energy apply in the context of a moving object?
The conservation of kinetic energy states that the total amount of kinetic energy in a closed system remains constant unless acted upon by an external force. In the context of a moving object, this means that the object will maintain its kinetic energy as long as no external forces, like friction or air resistance, act upon it.
