the slope on a distance time graph shows a ball moving from 20M to 40M in 1 second and from 40M to 80M in the next second. which describes the balls motion between 20M and 80M on the graph?

There are weak or strong attractive forces between atoms of liquids with a high viscosity

The energy released by a nuclear fusion reaction is produced when

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.