1.8461 km/hr Well i need more characters so i might as well type a beautiful sentence for you to read and waste your time on.
Objects repel and attract because of a thing called electrostatic attraction. When objects have the same charge (positive or negative), then they will repel, and if they have opposite charges then they will attract
The added weight of the sand puts more downward pressure on the wheels contacting the rails, which would cause the trains speed to decrease.
D. Velocity because it describes a speed and direction
Answer:
=6.5%
Explanation:
Mass of the ball:
]
Initial velocity of the ball: 
final velocity of the ball:
which is -30/100 of
=
Mass of the bottle: 
Initial velocity of the bottle: 
final velocity of the bottle:
is unknown (to find)
<em>by using conservation momentum, which stated that the initial momentum is equal to the final momentum.</em>
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<em>so since the bottle is at rest firstly, therefore </em>
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<em> </em><em>equation 1</em>
so now substitute
into equation 1

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<em>collect the like terms</em>


divide both side by 

Now substitute

6.5%
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