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प्रश्न
A particle has a velocity u towards east at t = 0. Its acceleration is towards west and is constant. Let xA and xB be the magnitude of displacements in the first 10 seconds and the next 10 seconds
विकल्प
xA < xB
xA = xB
xA > xB
the information is insufficient to decide the relation of xA with xB.
उत्तर
the information is insufficient to decide the relation of xA with xB.
As velocity and acceleration are in opposite directions, velocity will become zero after some time (t) and the particle will return.
\[\therefore 0 = u - at\]
\[ \Rightarrow t = \frac{u}{a}\]
Because the value of acceleration is not given, we cannot say that the particle will return after/before 10 seconds.
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