What volume V of helium is needed if a balloon is to lift a load of 180 kg (includine the welght of the empty balloon)? Density of helium 0.179 kg/m pa= 1.29 kg/m

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the