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1. A 2.05 kg object is held 3 m above the ground. Its potential energy relative to the ground is

A) 8 J.
B) 20 J.
C) 60 J.
D) 80 J.
E) none of the above

2. Which has greater kinetic energy, a car traveling at 30 km/h or another car of 2/3 the mass traveling at 60 km/h?

A) the 30-km/h car
B) the 60-km/h car
C) both have the same kinetic energy

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Category:- Physics
Reference No.:- M91696360

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