A ball of mass 0.3 kg is tied to one end of a string 0.8 m long and rotated in a vertical circle. If the tension in the string be zero at the highest point of the circle, the tension at the lowest point in this situation will be equal to

Question

A ball of mass 0.3 kg is tied to one end of a string 0.8 m long and rotated in a vertical circle. If the tension in the string be zero at the highest point of the circle, the tension at the lowest point in this situation will be equal to (A) zero (B) 2.94 N (C) 17.6 N (D) 19.60 N

Tardigrade Admin · Accepted Answer

Given, m =0.3 kg and 1=0.8 m ∵ TA-TC=6 mg The tension at the lowest point TA=6 mg [∵ TC=0] =6 × 0.3 × 9.8=17.6 N

Q. A ball of mass $0.3 k g$ is tied to one end of a string $0.8 m$ long and rotated in a vertical circle. If the tension in the string be zero at the highest point of the circle, the tension at the lowest point in this situation will be equal to

zero

2.94 N

17.6 N

19.60 N

Given, $m = 0.3 k g$ and $1 = 0.8 m$
$∵ T_{A} - T_{C} = 6 m g$
The tension at the lowest point $T_{A} = 6 m g$
$[∵ T_{C} = 0]$
$= 6 \times 0.3 \times 9.8 = 17.6 N$

Q. A ball of mass 0.3kg is tied to one end of a string 0.8m long and rotated in a vertical circle. If the tension in the string be zero at the highest point of the circle, the tension at the lowest point in this situation will be equal to