Question

3. A string can withstand a tension of 25 N. What is the
greatest speed at which a body of mass 1 kg can be
whirled in a horizontal circle using a 1 m length of a
string?
(a) 2.5 ms-1
(6) 5.0 ms-1
(c) 7.5 ms-1
(d) 10 ms-1​

Answer 1

answer and explaining

(b) 5.0 ms-1

What is the greatest speed at which a body of mass 1 kg can be whiled in a horizontal circle using 1 m lengt of the string? v=√25=5m/s