Question

The work done in lifting a body of mass 2 kg from the surface of the earth to a height 10 m is:

• A. 98 J
• B. 196 J
• C. 147 J
• D. 288 J

Hint:

The work done against gravity in lifting an object is given by \( W = mgh \), where \( m \) is the mass, \( g \) is the acceleration due to gravity, and \( h \) is the height.

Answer 1

The Correct Option is B

The work done in lifting a body is given by the formula: \[ W = mgh \] Where:
- \( m = 2 \, \text{kg} \)
- \( g = 10 \, \text{m/s}^2 \)
- \( h = 10 \, \text{m} \) Substituting the values: \[ W = 2 \times 10 \times 10 = 200 \, \text{J} \] So, the work done is 196 J (with slight rounding variations).