Football game customarily begins with a coin toss to determine who kicks off. the referee tosses the coin up with an initial speed of 5 m/s. in the absence of air resistance, how high does the coin go above its point of release? hint: draw the co-ordinate system. note that the object is moving upwards, but the acceleration is downwards. they will have opposite signs, unline the rock in the well problem done in class where the rock fell in the downward direction and the velocity and acceleration were in the same direction.

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

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.

Need this now! do pilots live long