Answer:
The second kinetic energy is 162 J.
Explanation:
Given that,
Mass,
Velocity,
Kinetic energy,
Mass,
Velocity,
We need to find kinetic energy . Kinetic energy is given by :
So,
So, the second kinetic energy is 162 J.
In the case of a swinging pendulum, Potential Energy is greatest when ____.
2 answers:
The correct answer is:
A. the pendulum ball is at its highest points away from a surface.
Explanation:
the potential energy of an object is given by
where m is the mass of the object, g is the gravitational acceleration, and h is the height of the object from the ground. Looking at the formula, we see that the potential energy is higher when h is higher, therefore when the pendulum ball is at the highest point away from the surface.
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Answer:
The high of the ramp is 2.81[m]
Explanation:
This is a problem where it applies energy conservation, that is part of the potential energy as it descends the block is transformed into kinetic energy.
If the bottom of the ramp is taken as a potential energy reference point, this point will have a potential energy value equal to zero.
We can find the mass of the box using the kinetic energy and the speed of the box at the bottom of the ramp.
Now applying the energy conservation theorem which tells us that the initial kinetic energy plus the work done and the potential energy is equal to the final kinetic energy of the body, we propose the following equation.
And therefore