A person on the edge of a roof throws a ball downward with an initial velocity v. It strikes the ground with 100 J of kinetic energy. The person throws another identical ball upward with the same initial speed v, and this too falls to the ground. Neglecting air resistance, the second ball hits the ground with a kinetic energy of:
- Less than 100 J
- 200 J
- More than 200 J
- 100 J

Question

08-08-2024
Physics

Answered

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A person on the edge of a roof throws a ball downward with an initial velocity v. It strikes the ground with 100 J of kinetic energy. The person throws another identical ball upward with the same initial speed v, and this too falls to the ground. Neglecting air resistance, the second ball hits the ground with a kinetic energy of:
- Less than 100 J
- 200 J
- More than 200 J
- 100 J

Sagot :

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