kg.m/s² is unit of :
Correct answer: C. Force
- A. Gravity
- B. Momentum
- C. Force
- D. Velocity
Explanation
The correct answer is Option C. According to Newton's second law of motion, force is the product of mass and acceleration, and its unit is the newton (N), which is expressed as kg.m/s². Option A is incorrect because the unit for gravity, or gravitational acceleration, is m/s². Option B is incorrect because momentum is measured in kg.m/s, not kg.m/s². Option D is incorrect as velocity is measured in m/s, not kg.m/s².
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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