The simple 2-kg pendulum is released from rest in the horizontal position. as it reaches the bottom position, the cord wraps around the smooth fixed pin at b and continues in the smaller arc in the vertical plane. calculate the magnitude of the force r supported by the pin at b when the pendulum passes the position theta = 30o .

On average 8 bananas make up one pound. the price is four pounds for 5.00. you must buy 25 bananas.what is your cost?

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm

The smallest particle of an element that retains its identity in a chemical reaction. true or false