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An object is lifted vertically 10 m against gravity. If the mass of the object i
An object is lifted vertically 10 m against gravity. If the mass of the object is 5 kg, what is the work done against gravity?
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Practice Questions
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Q1
An object is lifted vertically 10 m against gravity. If the mass of the object is 5 kg, what is the work done against gravity?
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Work done = mass × g × height = 5 kg × 9.8 m/s² × 10 m = 490 J.
Questions & Step-by-step Solutions
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Q
Q: An object is lifted vertically 10 m against gravity. If the mass of the object is 5 kg, what is the work done against gravity?
Solution:
Work done = mass × g × height = 5 kg × 9.8 m/s² × 10 m = 490 J.
Steps: 7
Show Steps
Step 1: Identify the mass of the object. In this case, the mass is 5 kg.
Step 2: Identify the height the object is lifted. Here, the height is 10 m.
Step 3: Know the acceleration due to gravity (g). It is approximately 9.8 m/s².
Step 4: Use the formula for work done against gravity: Work done = mass × g × height.
Step 5: Substitute the values into the formula: Work done = 5 kg × 9.8 m/s² × 10 m.
Step 6: Calculate the result: 5 × 9.8 = 49, then 49 × 10 = 490.
Step 7: Conclude that the work done against gravity is 490 Joules (J).
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