A star ship of the Federation flies past the planet Vulcan at a speed of 0.600c. A scientist on Vulcan measures the length of the moving star ship to be 74.0m. When the star ship lands on Vulcan, the same scientist measures the length of the stationary star ship. What value does she get?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?