Math

Question3. A block is released from rest at the top of a rough ramp. There is significant friction between the block and the ramp, but the block's speed increases as the block slides down the ramp. Which of the following correctly indicates whether the total mechanical energy of the block-Earth system decreases or remains the same, and provides a valid justification? (A) Decreases, because a force external to the system is dissipating energy (B) Decreases, because the gravitational potential energy of the system decreases (C) Stays the same because energy is always conserved (D) Stays the same because gravitational potential energy is converted into kinetic energy

Studdy Solution
The correct answer is (A) Decreases, because a force external to the system (friction) is dissipating energy.
The correct choice is:
(A) Decreases, because a force external to the system is dissipating energy \boxed{\text{(A) Decreases, because a force external to the system is dissipating energy}}

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