H2P-504
Conservation of energy
H2 Physics · JC 2 · Hard · Conservation of energy
A 0.40 kg block is pushed against a horizontal spring of constant 120 N m, compressing it by 0.15 m. The block is then released and slides along a rough horizontal surface. The frictional force is 0.60 N. What is the kinetic energy of the block after it has moved 0.50 m from its starting point?
- 0.75 J
- 1.05 J
- 1.35 J
- 1.65 J
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