If a 2 kg object is lifted to a height of 3 m, what is the potential energy gain

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Question: If a 2 kg object is lifted to a height of 3 m, what is the potential energy gained? (Use g = 9.8 m/s²) (2020)

Options:

Correct Answer: 58.8 J

Exam Year: 2020

Solution:

Potential Energy = mass × g × height = 2 kg × 9.8 m/s² × 3 m = 58.8 J

If a 2 kg object is lifted to a height of 3 m, what is the potential energy gained? (Use g = 9.8 m/s²) (2020)

If a 2 kg object is lifted to a height of 3 m, what is the potential energy gained? (Use g = 9.8 m/s²) (2020)

Step 1: Identify the mass of the object. In this case, the mass is 2 kg.
Step 2: Identify the height to which the object is lifted. Here, the height is 3 m.
Step 3: Identify the acceleration due to gravity (g). It is given as 9.8 m/s².
Step 4: Use the formula for potential energy: Potential Energy = mass × g × height.
Step 5: Substitute the values into the formula: Potential Energy = 2 kg × 9.8 m/s² × 3 m.
Step 6: Calculate the result: 2 × 9.8 = 19.6, then 19.6 × 3 = 58.8.
Step 7: The potential energy gained is 58.8 Joules (J).

Potential Energy – The energy possessed by an object due to its position in a gravitational field, calculated using the formula PE = mass × g × height.