A 4.0-kg mass attached to the end of a string swings in a ...

[mspears3]

A 4.0-kg mass attached to the end of a string swings in a vertical circle of radius 2.0 m. When the string makes an angle of 35 with the vertical as shown, the speed of the mass is 5.0 m/s. At this instant what is the magnitude of the force the string exerts on the mass?
 
   

   
  a.
  50 N
   
  b.
  82 N
   
  c.
  89 N
   
  d.
  11 N
   
  e.
  61 N

Question 2

An object attached to the end of a string swings in a vertical circle (R = 1.2 m), as shown. At an instant when = 30, the speed of the object is 5.1 m/s and the tension in the string has a magnitude of 20 N. What is the mass of the object?
 
   

   
  a.
  2.0 kg
   
  b.
  1.5 kg
   
  c.
  1.8 kg
   
  d.
  1.2 kg
   
  e.
  0.80 kg

[bpool94]

Answer to Question 1

b

Answer to Question 2

d

[mspears3]

TY

[bpool94]

You're welcome