For many years colonel john p. stapp, usaf, held the world's land speed record. he participated in studying whether a jet pilot could survive emergency ejection. on march 19, 1954, he rode a rocket-propelled sled that moved down a track at a speed of 632 mi/h. he and the sled were safely brought to rest in 1.40s

(a) determine the negative acceleration he experienced.
__ m/s2
(b) determine the distance he traveled during this negative acceleration.
__ m.

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

True or false graphs must include scales that increase by the same amount