2 PUILLS
Which of the following statements about the force of friction is true?
O
A. Friction acts in the same direction as the normal force.
O
B. Friction acts in the direction opposite to an object's motion.
O
C. Friction acts in the same direction as weight.
O
D. Friction acts in the direction opposite to weight.
SUBMIT

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.