A 1,200 kg car accelerates at 3 m/s2. What net force is the car experiencing during this acceleration?
0 3600 N
0 2000 N
2400 N
O ON

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.