A person on a pogo stick weighs 480 N. What spring force is necessary to have an upward acceleration of 2.2 m/s^2 immediately after leaving the ground?

Systems are in equilibrium. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. (Let m = 2.66 kg and ? = 29.0°.) scale in (a) N scale in (b) N scale in (c) N scale in (d) N

A 6.00 kg box sits at rest at the bottom of a ramp that is 8.00 mm long and is inclined at 30.0 degrees above the horizontal. The coefficient of kinetic friction is μk = 0.40, and the coefficient of static friction is μs = 0.43. What constant force F, applied parallel to the surface of the ramp, is required to push the box to the top of the ramp in a time of 6.00 s? Express your answer to four significant figures and include the appropriate units.