Which of the following statements are true fo | vedclass

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(D) Velocity is a vector quantity,meaning it depends on both speed (magnitude) and direction. Acceleration is defined as the rate of change of velocit

Vedclass · Accepted Answer

Both $(A)$ and $(C)$.

Vedclass · Answer

(D) Velocity is a vector quantity,meaning it depends on both speed (magnitude) and direction. Acceleration is defined as the rate of change of velocity $(a = dv/dt)$.$1$. If speed changes,the magnitude of velocity changes,which implies velocity changes. Since velocity changes,there must be acceleration. Thus,statement $(A)$ is true.$2$. If velocity changes,it could be due to a change in speed,a change in direction,or both. If only the direction changes (e.g.,uniform circular motion),the speed remains constant,but the velocity changes,resulting in centripetal acceleration. Therefore,statement $(B)$ is false because speed does not necessarily have to change.$3$. Since velocity changes imply acceleration,and speed may or may not change depending on whether the direction of motion changes,statement $(C)$ is true.Conclusion: Both $(A)$ and $(C)$ are correct.

Which of the following statements are true for a moving body?

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