When a thin crescent of the moon is visible just before sunrise, the moon is in its (a) waxing phase; (b) new phase; (c) waning phase; (d) quarter phase.

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.

What are the dimensions of the cross section that passes through the points a, f, g, and d?

The velocity of a car traveling in a straight line increases from 0 meters/second to 30meters/second in 8 seconds. what is the average acceleration of the car?