Question bank/JEE Main/Physics

JEE MainPhysicsModerateMotion in 1D

The variation of velocity with time of a toy car moving along a
straight line is as shown below. Which of the following graphs correctly
represents the variation of acceleration with time for the toy car?

Show answer and solution
for 0 to 1 seconds velocity increases linearly
a=4−21−0=2m/s2a = \frac{4 - 2}{1 - 0} = 2m/s^{2}
⇒\Rightarrowa vs t graph is st. line parallel to x-axis (+ve
acceleration)
for 1 to 1.5 sec.v=constant⇒a=0v = constant \Rightarrow a = 0
for t>1.5 sec. t > 1.5\ sec.\ a is negative

Source: Grass-G / P-05 Physics paper 10 October.docx

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