A spring (k = 600 N/m) is placed in a vertical position with its lower end supported by a horizontal surface. A 2.0-kg block that is initially 0.40 m above the upper end of the spring is dropped from rest onto the spring. What is the kinetic energy of the block at the instant it has fallen 0.50 m (compressing the spring 0.10 m)?
a. 5.3 J
b. 6.8 J
c. 6.3 J
d. 5.8 J
e. 6.5 J
b
Physics & Space Science
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