Recent content by jk2455

so this is what i did but now I am stuck and don't know if I am on the right track Ichild=45x22 = 180kgm2 Itotal=Imgr+Ichild =540kgm2 Vf=m1v1+m2v2/(m1+m2) =m1v1/(m1+m2) =1 m/s

the statement: a child runs at 3m/s and jumps tangentially onto a stationary merry-go-round. the moment of inertia of the merry-go-round is 360kgm2 and the radius is 2.0m. what is the angular velocity of the child and the merry-go-round? answer- 0.500rad s-1 or 0.500s[SUP]-1[/SUP i...

one question is x always positive even if the spring is stretched or compressed??

thanks a lot both of you(hotvette &PhanthomJay) i got the correct answer =)

Homework Statement A 1.5kg block is held against a spring of force constant 1.5×104 N/m, compressing it a distance of 0.20m .How fast is the block moving after it is released and the spring pushes it away?(m/s) answer=20m/s i am not sure what to do but i tried this and obviously...

A student in a pottery class leaves a freshly baked clay pot to cool down on a rotating platform. If the pot is positioned at 9cm away from the center, how fast does the platform rotate (in units of revolutions per seconds) when the pot is on the point of slipping? Assume that the...

thanks i got it

ok thanks ill try that and thanks for the note on top it will make things a bit easier :smile:

A basketball player makes a shot from a height of 2.50 m at an angle of 30 degrees above the horizontal. The horizontal distance between the player and the hoop is 6.00 m. The hoop is 3.00m above the ground. Find the magnitude of the initial velocity of the ball which will cause it to go...

thanks :)

but i am not sure where to start could someone give me a hint

Homework Statement During a bank robbery, one of the gangsters forgets a brick of gold on the roof of the car. Assuming that the car accelerates from rest with a constant acceleration, and that the brick was on the point of slipping, throughout the acceleration, how far did the car travel in...