Evelyn lifts a 180-kg barbell to a height of 1.95 m. What is the increase in the potential energy of the barbell?
A weight lifter raises a 185 kg barbell from the ground to a height of 1.5 m. What is the barbell's potential energy?
To calculate the increase in potential energy, we can use the formula:
Potential Energy (PE) = mass (m) × gravitational acceleration (g) × height (h)
Given:
Mass of the barbell (m) = 180 kg
Height (h) = 1.95 m
Gravitational acceleration (g) on Earth is approximately 9.8 m/s^2.
Substituting the values into the formula:
PE = 180 kg × 9.8 m/s^2 × 1.95 m
Simplifying, we get:
PE = 3528 J
Therefore, the increase in potential energy of the barbell is 3,528 Joules.
To calculate the increase in potential energy of the barbell, we need to use the formula for gravitational potential energy:
Potential Energy = mass * acceleration due to gravity * height
First, we need to determine the mass of the barbell. In the given question, it is mentioned that the barbell weighs 180 kg. Therefore, we can consider the mass as 180 kg.
Next, we need to determine the acceleration due to gravity. This is a constant value and is approximately 9.8 m/s^2 on Earth.
Lastly, we have the height of the barbell, which is given as 1.95 m.
Now, we can plug these values into the formula and solve for the increase in potential energy:
Potential Energy = mass * acceleration due to gravity * height
Potential Energy = 180 kg * 9.8 m/s^2 * 1.95 m
Calculating this equation, we can find the increase in potential energy of the barbell.