Question

If block A has ascended a height of 1m, then find the decrease in gravitational
potential energy of 2kg block (given m = lkg, m = 2kg) (g=10m/s²)
1) 20J
2) 10J
3) 3.335J
4) 6,675​

Answer 1

Total energy = Potential Energy + Kinetic Energy =800 J

At certain height when Potential Energy = Kinetic Energy =400 J

Kinetic Energy =

2

1

mv

2

=400

⇒v=20 m/s

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Answer 2

Answer:

of which class it is first tell this then I solve your query