What does the area between the line and the x axis represent on a velocity vs time graph

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.

Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?

An 800 kg car is moving at 32 m/s. what magnitude force is needed to bring that car to a stop in 30 seconds?