Which of the following list of physical quantities consists only of vectors?
Correct answer: D. Force, acceleration, velocity
- A. Time, temperature, velocity
- B. Force, volume, momentum
- C. Velocity, acceleration, mass
- D. Force, acceleration, velocity
Explanation
Force is a vector quantity. It has both magnitude and direction. The direction of the force is as important as its magnitude in describing its effect. Acceleration is a vector quantity. It indicates the rate of change of velocity and has both magnitude and direction. Acceleration may involve speeding up, slowing down, or changing direction. Velocity is a vector quantity. It is the rate of change of displacement and includes both magnitude (speed) and direction. In summary, force, acceleration, and velocity are all vector quantities.
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About Vectors and Equilibrium
Vectors have magnitude and direction, unlike scalars, and are combined by head-to-tail or parallelogram methods. Work covers rectangular components, equilibrium when the resultant force is zero, the scalar product for work and projections, and the vector product for torque and cross-product direction using the right-hand rule.
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Which of the following is the only vector quantity?
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