A 10 kg object is dropped from a height of 20 m. What is its potential energy at
Practice Questions
Q1
A 10 kg object is dropped from a height of 20 m. What is its potential energy at the top? (g = 10 m/s²) (2022)
200 J
100 J
50 J
300 J
Questions & Step-by-Step Solutions
A 10 kg object is dropped from a height of 20 m. What is its potential energy at the top? (g = 10 m/s²) (2022)
Step 1: Identify the mass of the object. In this case, the mass (m) is 10 kg.
Step 2: Identify the height from which the object is dropped. The height (h) is 20 m.
Step 3: Identify the acceleration due to gravity. Here, g is given as 10 m/s².
Step 4: Use the formula for potential energy (PE), which is PE = m * g * h.
Step 5: Substitute the values into the formula: PE = 10 kg * 10 m/s² * 20 m.
Step 6: Calculate the potential energy: 10 * 10 * 20 = 2000 J.
Potential Energy – Potential energy is the energy possessed by an object due to its position in a gravitational field, calculated using the formula PE = m * g * h.
