A body of mass $5\, kg$ is placed at the origin, and can move only on the $ x-$axis. A force of $10\, N$ is acting on it in a direction making an angle of ${60^o}$ with the $x-$axis and displaces it along the $x-$axis by $4 \,metres$. The work done by the force is......$J$
A body of mass $5\, kg$ is placed at the origin, and can move only on the $ x-$axis. A force of $10\, N$ is acting on it in a direction making an angle of ${60^o}$ with the $x-$axis and displaces it along the $x-$axis by $4 \,metres$. The work done by the force is......$J$
$2.5$
$7.25$
$40$
$20 $
A body of mass $5\, kg$ is placed at the origin, and can move only on the $ x-$axis. A force of $10\, N$ is acting on it in a direction making an angle of ${60^o}$ with the $x-$axis and displaces it along the $x-$axis by $4 \,metres$. The work done by the force is......$J$
$W = FS\cos \theta = 10 \times 4 \times \cos 60^\circ = 20\,Joule$