AP Physics 1easymcq1 pt
Mechanical energy is conserved in which situation?
A.A block sliding down a frictionless ramp
B.A box pushed at constant speed across a rough floor
C.A car braking to a stop
D.A ball falling at terminal velocity
Explanation
Core Concept
Only conservative forces (gravity, normal) act, so K + U stays constant.
Correct Answer
AA block sliding down a frictionless ramp
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