- #1
kfstarrs
- 1
- 0
Is there a direct experiment to determine the kinetic energy of a mass droped from a height to confirm the conservation of potential & kinetic energy?
kfstarrs said:Is there a direct experiment to determine the kinetic energy of a mass droped from a height to confirm the conservation of potential & kinetic energy?
How can we measure instantaneous velocity? Any instruments to do that?Astronuc said:One can measure mass, distance/displacement, and time, and changes thereof.
The difference in gravitational potential energy is just product of the weight, mg, and the displacement (along the gradient, i.e. perpendicular to the 3D surface of constant gravitational potential) in the gravitational field.
As fargoth mentioned, one must measure, or rather determine the velocity, which is done my measuring displacement and time, determining the displacement as a function of time, the derivative of which is speed (magnitude of velocity). Knowing the instantaneous speed, one can determine (derive) the instantaneous kinetic energy.
Kinetic energy is the energy an object possesses due to its motion.
Kinetic energy can be measured directly by using a specialized instrument called a ballistic pendulum, which measures the impact of an object in motion on a stationary target.
Kinetic energy is typically measured in joules (J) in the International System of Units (SI). However, it can also be measured in other units such as foot-pounds (ft-lb) or calories (cal).
The kinetic energy of an object depends on its mass and velocity. The larger the mass and the faster the velocity, the greater the kinetic energy.
Direct measurement of kinetic energy allows for more accurate and precise measurements, which is crucial in many scientific applications such as studying the motion of particles or calculating the energy of moving objects in physics experiments.