Question

In which case would the particle move in a straight line along the negative direction of y-axis (i.e., move along -$\hat{y}$)?

• A. $\left(III\right)\left(ii\right)\left(P\right)$
• B. $\left(II\right)\left(iii\right)\left(Q\right)$
• C. $\left(IV\right)\left(ii\right)\left(S\right)$
• D. $\left(III\right)\left(ii\right)\left(R\right)$

Answer 1

The correct option is D $\left(III\right)\left(ii\right)\left(R\right)$

For particle to move in -ve y-direction, either its velocity must be in –ve y-direction (if initial velocity is not equal to zero) & force should be parallel to velocity or it must experience a net force in –ve y-direction only (if initial velocity = 0)