the P platform is located on a spring and is tied to the ground with lines so that they cause the spring to deflect from a free state of 1 m to 0.4 m. Next, a brick with a mass of 2 kg was placed on the platform and the spring was loaded by 0.1 m, and then the platform with the brick was released so that the brick was shot up to the height h. Determine the height h in relation to the ground. Assume the acceleration due to gravity g = 9.81 m / s ^ 2.
the P platform is located on a spring and is tied to the ground with lines so that they cause the spring to deflect from a free state of 1 m to 0.4 m. Next, a brick with a mass of 2 kg was placed on the platform and the spring was loaded by 0.1 m, and then the platform with the brick was released so that the brick was shot up to the height h. Determine the height h in relation to the ground. Assume the acceleration due to gravity g = 9.81 m / s ^ 2.
k = 250 N/m
The initial length of the spring is 1 m and now the length of spring is 0.4 m. So, the compression in spring is 0.6 m. Now when the brick of mass 2 kg is placed on it, it is then compressed by again 0.1 m and hence total compression is 0.7 m.
Now it is to be noted that before the release of the brick the height of the brick is 0.3 m from the ground. Also, the velocity of the brick before the release and at maximum height is 0. So the initial and final kinetic energy is zero.
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