Answer to Question #107550 in Atomic and Nuclear Physics for Oluchi

Question

Calculate the work done when an object of mass, 50kg is moved through a distance of 5m. (g=10m/s).

Answer 1

Work done =$F.d=Fd\cos\theta$

where F is the force and d is the distance moved and $\theta$ is the angle between the force and the displacement vector

here mg is force acting vertically downwards and displacement vector is perpendicular to mg

hence cos 90⁰ which will make the work done by the gravitational force =0