Ametal block of mass 265 g rests at a point 2.4 m from the center of a horizontal rotating wooden platform. the coefficient of static friction between the block and the platform is 0.257. the platform initially rotates very slowly but the rotation rate is gradually increasing. the acceleration of gravity is 9.8 m/s 2 . at what minimum angular velocity of the platform would the block slide away? answer in units of rad/s.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)