A father pushes his child on a swing. He pushes with a force of 20 N or a distance of 1 m, with the force always maintained parallel to the direction of motion of the swing. How much work did the father do

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Determine the maximum r-value of the polar equation r =3+3 cos 0

How is the gravitational force related to the distance between two objects?