1) If the mass of a system doesn’t change with time, then this system is a(n) ......... system. Fill in the blank. Isolated or closed ?
2) Which one of the following is wrong for the motion with constant velocity ?
A) Acceleration is constant B)Average velocity is constant C) Instantaneous velocity is constant D)Acceleration is 0
3) A 3.00 kg mass moves on a 30.0 degree frictionless inclined plane from at rest, then it slides about a distance negligible mass spring as shown in figure 7. After rhen the mass slides about 0.200 m further and stops b..... constant (k) of the spring is 400 N/m, find the distance (d) between the mass and the spring.
4) (-2.0J , 2.0J, 5.1J, -3.5J)find the work done by the force f
Thanks a lot. I'cant solve these questions.