AFNS — AFNS Physics
Work and Energy
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#9 Work-energy theorem:
A) Work equals change in KE
B) Work equals PE only
C) No relation
D) Force zero
Answer: A
#10 Conservative force:
A) Work independent of path
B) Always dissipates
C) Only friction
D) Only tension
Answer: A
#11 Gravitational PE increases when:
A) Height increases
B) Speed increases
C) Mass decreases
D) g zero
Answer: A
#14 Mechanical energy conserved if:
A) Only conservative forces work
B) Friction always present
C) Air drag large
D) Inelastic always
Answer: A
#15 Efficiency is:
A) Useful output / input
B) Input / output
C) Always 100%
D) Always zero
Answer: A
#16 Unit of energy same as:
A) Work (Joule)
B) Power
C) Force
D) Pressure
Answer: A
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