A 100 kg crate is attached to a rope wrapped around the inner ...

[jon_i]

A 100 kg crate is attached to a rope wrapped around the inner disk as shown. A person pulls on another rope wrapped around the outer disk with force F to lift the crate.
   
 
   
   What force F is needed to lift the crate 2 m?

  1.about 20 N
  2.about 50 N
  3.about 100 N
  4.about 200 N
  5.about 500 N
  6.about 1,000 N
  7.about 2,000 N
  8.about 5,000 N
  9.Impossible to determine without knowing the radii
  10.Impossible to determine for some other reason(s)

Question 2

A disk, with radius 0.25 m and mass 4 kg, lies flat on a smooth horizontal tabletop. A string wound about the disk is pulled with a force of 8N. What is the angular acceleration of the disk?
 

[sarajane1989]

Answer to Question 1

4

Answer to Question 2

[jon_i]

Thank you!

[sarajane1989]

Always glad to help...