Question

Which of the following quantities are always positive in a simple harmonic motion?
(a) →F. →a.
(b) →v. →r.
(c) →a. →r.
(d) →F. →r.

Answer 1

Answer:

force and acceleration are always positive in shm,ND force must be linearly proportional to displacement....

Answer 2

$\rightarrow F . \rightarrow a$ are always positive in a simple harmonic motion

Explanation:

• It is to be noted that the direction of acceleration and force is always the same.So,$\rightarrow F . \rightarrow a$ is positive always.  
• It is to be noted that $\rightarrow F . \rightarrow r$ will be negative always. It is also to be understood that the acceleration has to be in the identical direction as the force is shown as$\rightarrow a, \rightarrow r$.
• So, this will also be seen in negative always.