• Support PF! Buy your school textbooks, materials and every day products Here!

Mechanics problem, need some help

  • Thread starter VinSoft
  • Start date
  • #1
1
0
A weight with a mass of 3 kg is attached to a string of length 50 cm. One end of the string is fixed at the origin (x=0, y =0) and the weight is pushed on a frictionless table top so that it moves horizontally in a circle with constant angular velocity %omega. The weight moves in the x-y plane, z=0. At a certain time the velocity of the mass is vx = -3m/s , vy = 2m/s.

The total force is 54i +24j [N] (Not a given, calculated)

The question is:

At the instant the velocity is as above the string is cut. Where is the mass 4 seconds later? Ignore the effects of gravity and friction.

I really need some help with this one.. Thanks alot
 
Last edited:

Answers and Replies

  • #2
1,444
2
when cut the body is moving at -3m/s in the X
and 2m/s in the Y
will the direction or magnitude of any of these change after the string is cut?
what happens 4s later then? What is the displacement from the original position
 
Top