A 5 kg object is lifted to a height of 3 m. What is the work done against gravit
Practice Questions
Q1
A 5 kg object is lifted to a height of 3 m. What is the work done against gravity?
15 J
30 J
45 J
60 J
Questions & Step-by-Step Solutions
A 5 kg object is lifted to a height of 3 m. What is the work done against gravity?
Step 1: Identify the mass of the object. In this case, the mass (m) is 5 kg.
Step 2: Identify the height to which the object is lifted. Here, the height (h) is 3 m.
Step 3: Identify the acceleration due to gravity (g). The standard value is approximately 9.8 m/s².
Step 4: Use the formula for work done against gravity, which is W = mgh.
Step 5: Substitute the values into the formula: W = 5 kg * 9.8 m/s² * 3 m.
Step 6: Calculate the result: W = 5 * 9.8 * 3 = 147 J.
Work Done Against Gravity – The work done against gravity is calculated using the formula W = mgh, where m is mass, g is the acceleration due to gravity, and h is the height.
