A typical helicopter with four blades rotates at 310 rpm and has a kinetic energy of 6.45 X 10^5 J. What is the total moment of inertia, in kg · m^2 of the blades?

Apossible explanation for a set of facts that can be tested by further investigation is called

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s