A particle moves one dimension |WorkEnergyPowerJEEMain2019

JEE MAIN 2019

08-04-2019 S1

Question

A particle moves in one dimension from rest under the influence of a force that varies with the distance travelled by the particle as shown in the figure. The kinetic energy of the particle after it has travelled 3 m is

Select the correct option:

4 J

2.5 J

5 J

6.5 J

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\begin{aligned} & =\text { Area under F-x graph } \\ & \Delta \mathrm{KE}=\mathrm{W}=\frac{1}{2} \times(3+2) \times(3-2)+2 \times 2 \\ & =2.5+4 \\ & =6.5 \mathrm{~J}\end{aligned}$

Question Tags

JEE Main

Physics

Easy

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