Which type of energy stored in the barbell when it is held above the weightlifters head
The type of energy stored in the barbell when it is held above the weightlifter's head is called potential energy.
The energy stored in the barbell when it is held above the weightlifter's head is potential energy. Potential energy is defined as the energy that an object possesses due to its position or state. In this case, as the weightlifter lifts the barbell against the force of gravity, the barbell gains potential energy.
To calculate the potential energy of the barbell, you can use the equation:
Potential energy (PE) = mass (m) * acceleration due to gravity (g) * height (h)
1. Determine the mass of the barbell in kilograms. This information is typically provided or can be measured using a scale.
2. Find the standard acceleration due to gravity, which is approximately 9.8 m/s² on Earth.
3. Measure the height of the barbell from the ground to the weightlifter's head in meters. Ensure that the height is measured vertically from the ground to the center of mass of the barbell.
4. Substitute the values into the formula and calculate the potential energy.
For example, if the barbell has a mass of 20 kg and the height from the ground to the weightlifter's head is 2 meters, the potential energy would be:
Potential energy (PE) = 20 kg * 9.8 m/s² * 2 m = 392 Joules
Therefore, when the weightlifter holds the barbell above their head, it has 392 Joules of potential energy.
well, what kinds of energy do you know about? There aren't very many.
hint: the barbell has velocity = 0