Igcse moments
Help :(
I don’t know how to get 90N

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?