Physics AP
posted by Robert .
A conical pendulum is formed by attaching a 50 g mass to a 1.2m string. The mass swings around a circle of radius 25cm. A claculate the speed of the mass. B Calculate the acceleration of the mass. C calculate the tension in the string

cos φ=0.25/1.2 =0.208 => φ=78°
sinφ=0.98, tan φ=4.7.
x: ma=Tcosφ
y: 0=Tsinφmg
a=v²/R,
Tsinφ=mg
Tcosφ= mv²/R
Tsinφ/Tcosφ= mgR/ mv²
tanφ= gR/v²
v=sqrt{gR/tanφ}=sqrt(9.8•0.25/4.7) =0.72 m/s
a= v²/R=0.72²/0.25=2.1 m.s²
T=mg/sinφ=0.05•9.8/0.98 = 0.5 N
Respond to this Question
Similar Questions

physics
a conical pendulum is formed by attaching a 500g ball to a 1m long string then allowing the mass to move in a horizontal circle of radius 20 cm. A) what is the tension of the string? 
physics
100 g mass is attached to a string 75 cm long. swings in a horizontal circle. The mass goes around its path once every 0.8. seconds. What is centripetal acceleration of the object? 
Physics
A conical pendulum is formed by attaching a ball of mass m to a string of length L, then allowing the ball to move in a horizontal circle of radius r. 1. Find an expression for the tension T in the string. (Express your answer in terms … 
Physics
Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. Given the proper push, this pendulum can swing in a circle at an angle q of 25.5 with respect to the vertical, maintaining … 
Physics
A conical pendulum is formed by attaching a 0.200kg ball to a 1.00 mlong string, then allowing the mass to move in a horizontal circle of radius 40.0cm . The figure (Figure 1) shows that the string traces out the surface of a cone, … 
Physics
A conical pendulum is formed by attaching a 0.60kg ball to a 1.0m long string, then allowing the mass to move in a horizontal circle of radius 30cm. 1. What is the tension in the string 2. What is the ball's angular velocity in rpm? 
Physics
A mass of 0.475 kg, on a frictionless table, is attached to a string which passes through a hole in the table. The hole is at the center of a horizontal circle in which the mass moves with constant speed. The radius of the circle is … 
physics
A 2.0 mass tied to the end of a 1.5m string swings as a pendulum. At the lowest point In its swing, the speed of the mass is 4.6 m/s. What is speed of the mass when at the instant when the string makes and angle of 35 degrees with … 
Physics Angular Motion
a 5.0 kg mass attached to the end of a string swings in a vertical circle (radius 2m) when the mass is at its lowest point on the circle the speed of the mass is 12 m/s. What is the tension of the string at this point? 
physics
A 3.6 kg mass attached to the end of a string swings in a vertical circle (radius = 17.9 m). When the string is horizontal, the speed of the mass is 3.8 m/s. What is the magnitude of the force of the string on the mass at this position?