27. find the acceleration of a particle moving with a con-
stant speed of 8 m/s in a circle 2 m in radius.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

What is the coefficient of kinetic friction μk between the block and the tabletop?