What is the KE of a 4 kg rock rolling at 10 m/s? KE = 1/2 mv2
1 answer:
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Answer:
Explanation:
Let T be the tension in the swing
At top point
where v=velocity needed to complete circular path
r=distance between point of rotation to the ball center=L+\frac{d}{2} (d=diameter of ball)
Th-resold velocity is given by
To get the velocity at bottom conserve energy at Top and bottom
At top
Energy at Bottom
Comparing two as energy is conserved
Answer:
500 hours
Explanation:
The sum of total hours over its lifetime will be given by
Where T is total time, r is rate in decimal and To is the original charge hours. Substituting the original charge hours with 5 hours and rate as 0.99 then the time will be
Therefore, the time is equivalent to 500 hours