Conservation of Energy

AP Physics 1· difficulty 2/5

A B

A pendulum is released from rest at point A (6060^\circ from vertical) and swings to its lowest point B. Comparing energies at A and B,

  • A

    UA>UBU_A > U_B but KA<KBK_A < K_B

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  • B

    UA=UBU_A = U_B and KA=KBK_A = K_B

  • C

    UB>UAU_B > U_A

  • D

    KA>KBK_A > K_B

Explanation

Released from rest at A: KA=0K_A = 0, UAU_A maximum. At B (lowest): UBU_B minimum, KBK_B maximum.

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