Answer:
The final velocity is 
Explanation:
From the question we are told that
The mass of the child is 
The initial speed of the child is 
The mass of the wagon is 
The initial speed of the wagon is 
The mass of the ball is 
The initial speed off the ball is 
Generally the initial speed of the system (i.e the child , wagon , ball) is
Generally from the law of linear momentum conservation
Here 
is the momentum of the system before the ball is dropped which is mathematically represented as
=> 
=> 
and
is the momentum of the system after the ball is dropped which is mathematically represented as
=> 
So
=>
<span>∆U = μB = (1.5)(0.815) = 1.2225 joules</span>
Answer:
the answer would be "using more heat" btw
Explanation:
Answer: 
Explanation:
If we have an initial amount of a radioactive material or substance, which is 
, and we also are told this amount decays 
each year, this means each year 
of the substance remains:
<u />
<u>To understand it better:</u>
Year 1: 
Year 2: 
Year 3: 
and so on until year 
:
Year t: 
Therefore, the function tha best describes this radiation decay situation is:
Answer:
position 3
Explanation:
in position 3 PE is least as height is least
so KE is most as energy is always conserved
