Question

A ball of mass $0.25\, kg$ attached to the end of a string of length $1.96\, m$ is moving in a horizontal circle. The string will break if the tension is more than $25 \,N$ . What is the maximum speed with which ball can be moved?

• A. $14 \,m/s$
• B. $3 \,m/s$
• C. $3.92 \,m/s$
• D. $5 \,m/s$

Answer 1

Answer: (A)

$14 \,m/s$

Answer 2

The correct option is(A): __ 14m/s.
Tension of string $T=\frac{m v^{2}}{r}$ $25 =\frac{0.25 \times v^{2}}{1.96}$ $v =14\, m / s$