A 5 kg object is dropped from a height of 20 m. What is the potential energy at
Practice Questions
Q1
A 5 kg object is dropped from a height of 20 m. What is the potential energy at the top? (g = 9.8 m/s²)
980 J
490 J
196 J
9800 J
Questions & Step-by-Step Solutions
A 5 kg object is dropped from a height of 20 m. What is the potential energy at the top? (g = 9.8 m/s²)
Step 1: Identify the mass of the object. In this case, the mass (m) is 5 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. The value of g is 9.8 m/s².
Step 4: Use the formula for potential energy, which is PE = mgh.
Step 5: Substitute the values into the formula: PE = 5 kg * 9.8 m/s² * 20 m.
Step 6: Calculate the potential energy: PE = 5 * 9.8 * 20 = 980 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 = mgh, where m is mass, g is acceleration due to gravity, and h is height.
