Question

While a balloon-supported gondola is rising at a speed of 2.0 m/s, a passenger in the gondola throws a small ball up at a speed of 2.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is 2.0 m/s, up. 2.8 m/s, down. 3.0 m/s, up. 5.0 m/s, up. O 7.0 m/s, up.

Answer 1

.

m since the gondola is rising at a speed of =v=2.0-up relative to ground S the passenger in the gondola is also moving up with thesame speed as gondola, m and the ball which is in his hand should also be moving with a speed=v= 2.0-up relative to ground S for a person who measure the ball velocity with respect toground m at the instance of relea sin gthe ball is = 2.0-up here we should consider that the person measure the velocity of ball at the moment just before the ball left the hand of passenger who throw it, so we are not adding the velocity of throw. hence the velocity of the ball relative to ground at the instant of release is = 2.0 up S