In the SI system, what are the fundamental units of momentum?
A. kg m s⁻¹
B. kg m² s⁻¹
C. kg m s⁻²
D. kg² m s⁻¹
Answer: Option A
Solution (By JKExamLibrary)
Momentum (p) is defined as the product of mass (m) and velocity (v). p = m × v. The SI unit of mass is the kilogram (kg) and the SI unit of velocity is meters per second (m/s or m s⁻¹). Therefore, the SI unit of momentum is kg m/s or kg m s⁻¹.
Explanation:
Galileo Galilei conducted experiments rolling balls down inclined planes and concluded that an object in motion would continue moving indefinitely on a frictionless surface. This completely challenged Aristotelian mechanics and formulated the concept of inertia, which Isaac Newton later formalized as his First Law of Motion.
Explanation:
Ohm's law V=IR is linear relationship, valid for ohmic materials like metals at constant temperature. Non-ohmic do not follow linear I-V. Semiconductors are non-ohmic.
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