40-kg particle moves under the influence of a single conservative force.

1. A 0.40-kg particle moves under the influence of a single conservative force. At point A where the particle has a speed of 10 m/s, the potential energy associated with the conservative force is +40 J. As the particle moves from A to B, the force does +25 J of work on the particle. What is the value of the potential energy at point B?
a.     +65 J
b.     +15 J
c.     +35 J
d.     +45 J
e.     -40 J
 
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