Originally posted by tomtom232 A 0.500 kg mass on a 3.20 meter string moves 2.5 radians/sec (1 revolution = 2 x pie x radians) in a horizontal circle. What angle does the string make with the vertical?
heres another one
A sled weighing 200N rests on a 15 degree incline, held in place by static friction. The coefficient of static friction is 0.5. (a) What is the magnitude of the normal force on the sled? (b) Whatis the magnitude of the static friction on the sled? (c) The sled is now pulled up the incline at a constant speed by a child. The child weighs 500N and pulls on the rope with a constant force of 100N. The rope makes an angle of 30 degrees with the incline and has negligible weight. What is the magnitude of the kinetic fricition force on the sled? (d) What is the coefficient of kinetic friction between the sled and the incline?