There are free body diagrams in the picture, number (#). which of the diagram(s) shows an object with a net force down?

a.3 and 4

b.2 and 4

c.4 only

d.3 only

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.

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.