SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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0.26 m
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0.52 m
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5.2 m
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25 m
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Detailed explanation-1: -The total mechanical energy of the ball is E=25 J E = 25 J . The kinetic energy at the said point is Ek=17 J E k = 17 J . The gravitational potential energy Eg equals the total mechanical energy of the system minus the kinetic energy, i.e. The potential energy of the ball is 8 Joules.
Detailed explanation-2: -H is equal to this is 989800. That means it is 9800 divided by 9.8, which means 1000 point. So this h is equal to 1000 divided by 56, and when you divide this number, you get what the sight is equal to 17.85 over 86.
Detailed explanation-3: -How much kinetic energy does a 1.2 kg ball have the moment it hits the ground 3.5 meters below when it starts from rest? I cancelled out the initial kinetic energy because: KEi = ½ mv. KEi = (½)(3.5)(02) = 0 J.