An antelope is running away at 15 mph after being startled by a predator. the antelope then slows to rest. what is its change in velocity?

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

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.

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