Get premium membership and access questions with answers, video lessons as well as revision papers.

An object of mass 0.4kg is rotated by a string at a constant speed, v in a vertical circle of radius 1m. If the minimum...

      

An object of mass 0.4kg is rotated by a string at a constant speed, v in a vertical circle of radius 1m. If the
minimum tension in the string is 3N, calculate :
a) The speed, v

b) Maximum tension in the string

c) The tension when the string is just horizontal

  

Answers


Moraa
a) The speed, v
Tmin= mv2/r –mg
3=0.4(v2/1 -10)
V2=(3+4)/0.4 =70/4
V=(70/4)1/2=4.183m/s
b) Maximum tension in the string
Tmax=m(v2/r +g) =0.4(70/4 +10)
= 11N
c) The tension when the string is just horizontal
T=mv2/r = 0.4*70/4 =7N
Moraa orina answered the question on April 11, 2018 at 17:06


Next: An object of mass 8kg is whirled round rapidly in a vertical circle of radius 2m with a constant speed of 6m/s. Calculate the maximum...
Previous: A bob of mass 1kg is moving in a uniform circular path in a vertical plane of radius 1m. If it is whirled at...

View More Physics Questions and Answers | Return to Questions Index


Learn High School English on YouTube

Related Questions