JEE Main 2017 · 2 Apr · Shift 1 · Physics Q2

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PhysicsSingle correct+4 / -1Question 2 of 90

A body is thrown vertically upwards. Which one of the following graphs correctly represent the velocity vs time ?

v rises linearly, then falls linearly back to zero

Graph of v against t: a straight rise to a peak, then a straight fall to the t-axis.

Starting positive, v falls linearly through zero and continues below, drawn as two arrows meeting on the t-axis

Graph of v against t: two straight segments meeting at a point on the t-axis, one from positive v and one going to negative v.

Starting positive, v falls along a single straight line through zero to negative values

Graph of v against t: a single straight line starting at positive v and falling through the t-axis to negative v.

v falls linearly to zero, then rises linearly

Graph of v against t: a straight fall to the t-axis, then a straight rise.

Answer and worked solution

Official answer: C

With up positive, $v=u-gt$ : a single straight line of slope $-g$ , starting positive and crossing zero at the top, then continuing negative. That is graph (3).

Topics:Motion graphs

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JEE Main 2017 · 2 Apr · Shift 1, Physics question 2