OnlineCBT
Physics · MOTION IN A STRAIGHT LINE
हिन्दीGiven below are two statements: Statement I: A particle can have zero velocity at an instant and yet have a non-zero acceleration at that same instant. Statement II: If a particle is speeding up, its acceleration must always be positive regardless of the choice of coordinate axis. In the light of the above statements, choose the most appropriate answer from the options given below:
Correct answer · Option 3
Statement I is correct but Statement II is incorrect.
Explanation
Statement I is correct: at the highest point of vertical throw, \( v = 0 \) but \( a = -g \neq 0 \). Statement II is incorrect: if a particle moves in the negative direction while speeding up, both its velocity and acceleration are negative.
