How many joules of work are done on an object when a force of 15 N pushes it a distance of 10 m

Are aliens real? justify you’re answer.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.