If a 5 kg object is lifted to a height of 10 m, what is the work done against gr
Practice Questions
Q1
If a 5 kg object is lifted to a height of 10 m, what is the work done against gravity? (g = 9.8 m/s²)
49 J
98 J
490 J
980 J
Questions & Step-by-Step Solutions
If a 5 kg object is lifted to a height of 10 m, what is the work done against gravity? (g = 9.8 m/s²)
Correct Answer: 490 J
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 10 m.
Step 3: Identify the acceleration due to gravity. The value of g is 9.8 m/s².
Step 4: Use the formula for work done against gravity, which is Work = mgh.
Step 5: Substitute the values into the formula: Work = 5 kg × 9.8 m/s² × 10 m.
Step 6: Calculate the result: 5 × 9.8 × 10 = 490 J.
Step 7: Conclude that the work done against gravity is 490 Joules.
Work Done Against Gravity – Work is calculated using the formula W = mgh, where W is work, m is mass, g is acceleration due to gravity, and h is height.