A 3 kg object is lifted to a height of 4 m. What is the work done against gravit
Practice Questions
Q1
A 3 kg object is lifted to a height of 4 m. What is the work done against gravity?
12 J
24 J
36 J
48 J
Questions & Step-by-Step Solutions
A 3 kg object is lifted to a height of 4 m. What is the work done against gravity?
Step 1: Identify the mass of the object. In this case, the mass (m) is 3 kg.
Step 2: Identify the height to which the object is lifted. Here, the height (h) is 4 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 Work = m * g * h.
Step 5: Substitute the values into the formula: Work = 3 kg * 9.8 m/s² * 4 m.
Step 6: Calculate the result: 3 * 9.8 * 4 = 117.6 J.
Step 7: Conclude that the work done against gravity is 117.6 Joules.
Work Done Against Gravity – The work done against gravity is calculated using the formula W = mgh, where W is work, m is mass, g is the acceleration due to gravity, and h is the height.
