Physics-Work Done by Forces
NEET Physics Work Done by Forces MCQ Question
Type: MCQ-numerical-Medium-Class 11
A block attached to a spring is pulled, stretching the spring by 2 meters. If the spring constant k is 0.5 N/m, what is the work done by the spring force?
A
-1 J
B
-0.5 J
C
1 J
D
0.5 J
Correct Answer
Option A
Detailed Explanation
The work done by the spring force is calculated using W = -kx^2/2. Substituting k = 0.5 N/m and x = 2 m, we get W = -0.5 * 2^2 / 2 = -1 J.
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