A positively charged object will:
O
A. exert a pulling force on another positively charged object.
O
B. attract a negatively charged object.
O
c. have no effect on another positive charge.
O
D. have no effect on a negative charge.

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.