A force of 5 N, making an angle θ with th

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A force of $5\, N$, making an angle $\theta $ with the horizontal, acting on an object displaces it by $0.4\,m$ along the horizontal direction. If the object gains kinetic energy of $1\,J$, the horizontal component of the force is......$N$

A

$1.5$

B

$2.5$

C

$3.5$

D

$4.5$

A force of $5\, N$, making an angle $\theta $ with the horizontal, acting on an object displaces it by $0.4\,m$ along the horizontal direction. If the object gains kinetic energy of $1\,J$, the horizontal component of the force is......$N$

Work done on the body = K.E. gained by the body
$FS\cos \theta = 1\;Joule$$⇒$$F\cos \theta $$ = \frac{1}{s} = \frac{1}{{0.4}} = 2.5N$