The club was in contact with a ball, initially at rest, for about 0.0045 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.4 ✕ 102 ft/s, find the average force (in kN) exerted on the ball by the club

How much work would be needed to raise the payload from the surface of the moon (i.e., x = r) to an altitude of 5r miles above the surface of the moon (i.e., x = 6r)?

Like a key in a lock, the shape of the. must bind with the. of the recieving neuron

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.