AFNS — AFNS Physics
Work and Energy
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#17 1 kWh equals:
A) 3.6 x 10^6 J
B) 1000 J
C) 360 J
D) 3.6 J
Answer: A
#19 Impulse-momentum theorem:
A) Impulse = change in momentum
B) Impulse = KE
C) No relation
D) Force zero
Answer: A
#20 Elastic PE in stretched bow:
A) Stored for arrow
B) Kinetic only
C) Thermal only
D) No storage
Answer: A
#21 Roller coaster at top of hill has max:
A) PE if speed low
B) KE always max
C) Both zero
D) Neither
Answer: A
#22 Power of motor 1 kW for 1 h does work:
A) 1 kWh
B) 1 J
C) 1000 N
D) 1 W
Answer: A
#23 Collision between two carts elastic:
A) KE conserved
B) Momentum not conserved
C) Both lost
D) No contact
Answer: A
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