physics
posted by Sam .
A boy whirls a stone in a horizontal circle of radius 1.9 m and at height 2.1 m above ground level. The string breaks, and the stone flies horizontally and strikes the ground after traveling a horizontal distance of 10 m. What is the magnitude of the centripetal acceleration of the stone while in circular motion?

physics 
drwls
The centripetal acceleration was V^2/R, where R = 1.9 m.
You need to compute V, the speed when in circular motion. First compute the time T that it takes the stone to fall 1.9 m.
1.9 m = (1/2) g T^2
V = Vx, the horizontal component of velocity after the string breaks
V = (10 m)/T 
physics 
Anonymous
98
Respond to this Question
Similar Questions

Physics
A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 2.0 m above ground level. The string breaks, and the stone flies horizontally and strikes the ground after traveling a horizontal distance of 10 m. What is the … 
Physics/Math
A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 2.0 m above ground level. The string breaks, and the stone flies horizontally and strikes the ground after traveling a horizontal distance of 10 m. What is the … 
physics
A certain string can withstand a maximum tension of 40 N without breaking. A child ties a 0.37 kg stone to one end and, holding the other end, whirls the stone in a vertical circle of radius 0.91 m, slowly increasing the speed until … 
Physics
A boy is whirling around a stone tied at the end of a 0.71 m long string at constant angular speed of 4 revolutions per second in a plane perpendicular to the ground. The string breaks when it is making an angle of 54 degrees above … 
PHYSICS
A boy is whirling around a stone tied at the end of a 0.55 m long string at constant angular speed of 5 revolutions per second in a plane perpendicular to the ground. The string breaks when it is making an angle of 53 degrees above … 
physics
A boy whirls a stone in a horizontal circle of radius 1.3 m and at height 2.0 m above level ground. The string breaks, and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 9.8 m. What … 
physics
A stone is thrown from a building of height 40m and reaches a maximum height of 49m from the ground. The stone strikes the ground at a distance of 10m from the foot of the building. find the angle of elevation from which the stone … 
physics
A girl whirls a stone in a horizontal circle 1.5 m above the ground by means of a string 141 cm long. The string breaks, and the stone flies of horizontally and strike the ground 13.6 m away. What is the centripetal acceleration of … 
Physics
A girl whirls a stone in a horizontal circle 1.9 m above the ground by means of a string 111 cm long. The string breaks, and the stone flies of horizontally and strike the ground 11.2 m away. What is the centripetal acceleration of … 
Physics
A boy whirls a stone in a horizontal circle of radius 2.0 m and at height 2.2 m above level ground. The string breaks, and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 9.7 m. What …