A 3 kg object is dropped from a height of 15 m. What is its potential energy at
Practice Questions
Q1
A 3 kg object is dropped from a height of 15 m. What is its potential energy at the top? (g = 9.8 m/s²)
441 J
294 J
147 J
0 J
Questions & Step-by-Step Solutions
A 3 kg object is dropped from a height of 15 m. What is its 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 3 kg.
Step 2: Identify the height from which the object is dropped. Here, the height (h) is 15 m.
Step 3: Identify the acceleration due to gravity. It is given as g = 9.8 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 = 3 kg * 9.8 m/s² * 15 m.
Step 6: Calculate the potential energy: 3 * 9.8 * 15 = 441 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.
