2 Which of these is one of Newton's laws of motion?
A An object's momentum is the product of its
mass and velocity.
B A moving object will continue moving until a
force acts upon it.
C The force of gravity is proportional to the
inverse square of the distance.
D The rate at which an object falls depends on the
height from which it is dropped.

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

The two required components for a generator