not too sure on this one maybe to locate objects under water, to diagnose problems, to treat medical ailments
gravity and tension
i took the test
Answer: 5.9 m/s
Explanation:
This problem can be solved by the Conservation of Momentum principle, which establishes that the initial momentum must be equal to the final momentum :
(1)
Where:
(2)
(3)
is the mass of the skater
is the mass of the ball
is the initial velocity of the skater and the ball
is the final velocity of the ball
is the final velocity of the skater
Substituting (2) and (3) in (1):
(4)
Isolating :
(5)
(6)
Finally: