If an object weighs 80 newtons, what force must be applied to the rope to raise the object when the mechanical advantage is four?

which formula would you use to solve this problem?

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

What determines the amount of inertia an object has

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?