Physics Questions A merry go round (a disk I = 1/2MR^2, M=500kg, R=2m) rotates a
ID: 1299103 • Letter: P
Question
Physics Questions
A merry go round (a disk I = 1/2MR^2, M=500kg, R=2m) rotates at 0.7 rad/s. A child with a mass of 50kg is dropped onto the merry go round at a distance of 1.5m from the axis of rotation. What is the new rotation rate (rad/s) for the merry go ronud with the child? a) .42 b) .63 c) .73 d).92 e)1.3
A disk (m=.02 kg, r=.01m, I=.5MR^2) rolls down an incline from a height of 3m. At the bottom of the incline, what is the disk's translational velocity?
a) 5.42 m/s b)6.26m/s c)6.48m/s d)7.48 m/s e) 7.60 m/s
A car of mass 1000kg turns 20 degress inclined corner of radius 100m that has a coefficient of friction of 0.2. What is the maximum speed the car can have around this corner without sliding up the incline.
a) 17.4 m/s b) 22.4m/s c)24.4 m/s d)31.4 m/s e)35.3 m/s
Explanation / Answer
my answer is 1) A 2 )C 3 )D