STANDARDPhysics-Work, Energy and Power
STANDARD Physics Power in Mechanics MCQ Question
Type: MCQ-conceptual-Medium-Class 11
A body is initially at rest. It undergoes one dimensional motion with constant acceleration. The power delivered to it at time t is proportional to
A
t¹/²
B
t
C
t³/²
D
t²
Correct Answer
Option B
Detailed Explanation
Using the equation of motion v = u + at, where u = 0, we have v = at. Power P is given by P = F × v = (ma) × at = ma²t. Since m and a are constants, P ∝ t.
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