in the same direction as the displacement vector and the motion
Answer:
5.5 m/s
Explanation:
Assuming the bottle is initially stationary, we can write the law of conservation of momentum as follows:

where
is the mass of the ball
is the initial velocity of the ball
is the mass of the bottle
is the final velocity of the bottle
is the final velocity of the ball
Solving for
,

Answer:
Explanation:
Given
mass of object hanging from crane is 
mass is speeding up with 
If T is the Tension in the cable then





