Is there any force acting on the ball if it is lying stationary on the ground? If yes, What forces? If no, Why not?

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.