Atoolbox of mass 3.2kg is lowered by a rope from the roof to the ground. find the acceleration of the toolbox when the force of the rope is: a) 40.0 n b) 20.0n
a) 2.7m/s^2, up b) 3.6m/s^2, down
i would like an explanation or equation to get to that answer. you!

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Which one of the following research methods can show cause and effect

Ineed the answers for these promblems i have