Exams › NEET › Physics

An object moves in the $xy$-plane with an acceleration that has a positive $x$ component. At $t=0$, the object has a velocity given by $\vec v=3\hat i+0\hat j$. What can be concluded about the $y$ component of the acceleration?

1. The $y$ component must be positive and constant
2. The $y$ component must be negative and constant
3. The $y$ component must be zero
4. Nothing at all can be concluded about the $y$ component

Correct answer: Nothing at all can be concluded about the $y$ component

Solution

Only the $x$ component of acceleration is specified to be positive. The initial velocity at $t=0$ does not determine the $y$ component of acceleration. So no conclusion can be drawn about $a_y$.

Related NEET Physics questions

• The displacement of a body is given by $x = 5 + 3t + 2t^2$. The instantaneous acceleration is:
• k g m s⁻¹ is the Sl unit of
• What is the ratio of the distances moved by a freely falling body from rest in the 4th and 5th seconds of its journey?
• The velocity-time graph for a body with non-uniform motion (assume non- constant acceleration) is a:
• Two particles A and B have displacement-time graphs that are straight lines making angles of $30^\circ$ and $60^\circ$ with the time axis, respectively. What is the ratio of their speeds $v_A : v_B$?
• An object moves in the \(xy\)-plane with an acceleration that has a positive \(x\)-component. At \(t=0\), the object's velocity is \(\vec v = 3\hat i\,\text{m/s}\). What can be concluded about the \(y\)-component of the acceleration?

⚔️ Practice NEET Physics free + battle 1v1 →