Question

a particle a particle of mass 21 kg to a string of 70m is whirled round in a horizontal circle if the period of revolution is 2s find the tension in the string

Answer 1

Answer:

1.44×10^4 N

Explanation:

Refer to the material.

Answer 2

Thus the tension in the string is T = 14520 dyne

Explanation:

Given data:

• Mass = 21 g
• Length of string = 70 m
• Period of revolution = 2 s

Solution:

Tension = m r w^2

T = m r ( 2 π / T)^2

T  21 x 70 ( 2 x 22 / 7 x 2)^2

T = 14520 dyne

Thus the tension in the string is T = 14520 dyne