1) Calculate the magnitude of acceleration acting on a piece of dust that sits on an old dvd player, 2.25cm from the centre if the dvd is spinning 8.14hz 2) calculate the height in km above earths surface for a satellite with a soeed if 724 m/s? 3) a 98.1 kg pole vaulter running at 16.4 m/s vaults over the bar. Assuming the vaulter's horizontal component of velocity over the bar is 2.02m/s and disregarding air resistance, how high was the jump