If it takes 100n to push a 300n object up an incline plane , what was the ma of the ramp

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

What are atoms of the same element with varying number of neutrons

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?