Question

A mass tied to a string moves in a vertical circle with a uniform speed of 5 m/s as shown. At the point P the string breaks. The mass will reach a height above P of nearly (1) 1 m

(2) 0.5 m

(3) 1.27 m

(4) 1.25 m

Answer 1

Explanation:Use 3rd equation of motion

Answer 2

A mass tied to a string moves in a vertical circle with a uniform speed of 5 m/s as shown. At the point P the string breaks. The mass will reach a height above P of nearly

answer : option (4) 1.25 m

explanation : initial speed of particle , u = 5m/s

final speed of particle, v = 0

after breaking the string, acceleration acting on particle = acceleration due to gravity. i.e., a = g

using formula, v² = u² - 2gh

or, 0 = (5)² - 2 × 10 × h

or, h = 25/20 = 1.25 m

hence, the mass will reach a height above point P of nearby 1.25m